Adult Vaccine Schedule by Age – CDC Recommendations

The CDC recommends specific vaccines for adults based on age, health conditions, and prior vaccination history. Adults aged 19 to 26 should be current on HPV vaccine, those 50 and older need the Shingrix shingles vaccine, those 65 and older need pneumococcal and RSV vaccines routinely, and everyone 19 and older needs an annual flu shot. Catching up on missed childhood vaccines remains important at every adult age bracket.

What the CDC Actually Recommends by Age Group

The CDC’s Advisory Committee on Immunization Practices (ACIP), the federal panel that reviews vaccine evidence and sets immunization policy for the United States, publishes an updated adult immunization schedule every year. The 2024 schedule organizes recommendations into three tiers: vaccines recommended for all adults, vaccines recommended based on age, and vaccines recommended based on medical, occupational, or lifestyle risk factors.

Understanding the difference between a “routine” vaccine (one recommended for all adults at a specific age regardless of health status) and a “risk-based” vaccine (one recommended only for people with certain conditions or exposures) is the single most important concept for reading the schedule correctly.

The schedule is published jointly by the CDC, the American College of Physicians, the American Academy of Family Physicians, the American College of Obstetricians and Gynecologists, and several other major medical organizations. This multi-organization endorsement reflects broad clinical consensus rather than a single agency’s position.

Core Vaccines Every Adult Needs Regardless of Age

Four vaccines apply to all adults starting at age 19, regardless of health status, occupation, or lifestyle.

The Tdap vaccine (which protects against tetanus, diphtheria, and whooping cough simultaneously) is especially important for adults who will be around infants, since pertussis (whooping cough) can be life-threatening for newborns who are too young to be fully vaccinated themselves.

Adults who receive a deep wound, puncture, or burn and cannot confirm a tetanus booster within the past 5 years should receive a Td or Tdap dose immediately regardless of where they fall in their regular 10-year cycle. Emergency departments routinely administer tetanus boosters in this context. Receiving Tdap earlier than the 10-year window when a wound creates genuine risk is considered both safe and appropriate.

Ages 19 to 26: The Catch-Up Window

Adults aged 19 to 26 are routinely recommended to receive the HPV vaccine if they were not fully vaccinated during adolescence. This age range also represents the primary window for closing gaps on vaccines that should have been received during childhood or the teen years.

The HPV vaccine (Human Papillomavirus vaccine, which prevents several cancers including cervical, throat, and anal cancers caused by HPV infection) is the defining age-based recommendation for this group. The only HPV vaccine currently available in the United States is Gardasil 9, which covers 9 strains of HPV, including the two strains responsible for approximately 70% of cervical cancers and the two strains responsible for approximately 90% of genital warts.

Adults who started the HPV series but did not complete it can finish without restarting, even if years have passed since the last dose.

Other vaccines to confirm or complete during ages 19 to 26:

• MenACWY (Meningococcal conjugate vaccine, which protects against bacterial meningitis caused by four serogroups of Neisseria meningitidis): Recommended for college freshmen living in dormitories who were not previously vaccinated at age 16 or later
• MMR (Measles, Mumps, Rubella vaccine): Adults born after 1957 with no evidence of immunity need at least 1 dose; healthcare workers and international travelers need 2 doses
• Varicella (Chickenpox vaccine): Adults with no evidence of immunity need 2 doses separated by 4 to 8 weeks
• Hepatitis B: 3-dose series for all unvaccinated adults through age 59; the 2-dose Heplisav-B formulation is an alternative for adults 18 and older
• Hepatitis A: 2-dose series recommended for adults at increased risk or who want protection regardless of identified risk

Key Finding: The CDC recommends shared clinical decision-making for HPV vaccination in adults aged 27 to 45, meaning the decision happens between patient and provider based on individual risk of new HPV exposures. Adults in this window who are in new relationships or have other risk factors may meaningfully benefit from vaccination.

What “Evidence of Immunity” Actually Means

The phrase “evidence of immunity” (documentation confirming a person’s immune system is already protected against a specific pathogen) appears throughout the adult schedule for MMR and varicella specifically. Acceptable evidence includes any one of the following:

1. Written documentation of vaccination with the required number of doses administered at the correct ages
2. Laboratory confirmation of immunity via a positive antibody titer from a blood test
3. Laboratory confirmation of prior disease, or a healthcare provider’s written diagnosis of chickenpox in the medical record (for varicella)
4. Birth before 1957 (for measles and mumps, because widespread natural infection during that era makes prior immunity highly probable in that birth cohort)

Adults who cannot produce any of these forms of evidence are treated as susceptible and vaccinated accordingly. Receiving an additional dose of MMR or varicella in a person who is already immune carries no known safety risk.

The 27 to 49 Window: Risk-Based Decisions Drive the Schedule

Adults aged 27 to 49 have fewer routine age-triggered vaccine additions than younger or older groups, but individual health conditions and risk factors become the primary driver of what is recommended. The core annual and catch-up vaccines continue throughout this period.

Routine vaccines to verify during ages 27 to 49:

1. Annual flu vaccine (every adult, every year, no exceptions)
2. Updated COVID-19 vaccine formulation annually
3. Tdap or Td booster if 10 years have passed since the last dose
4. Catch-up MMR if no documented evidence of immunity exists
5. Catch-up Varicella if no documented prior infection or vaccination
6. Hepatitis B series if not previously completed

Risk-based vaccines that become relevant during this period:

• Pneumococcal vaccines (PCV15 or PCV20, which protect against Streptococcus pneumoniae bacteria that cause pneumonia, bloodstream infections, and meningitis): Recommended for adults 19 to 64 with diabetes, heart disease, chronic lung disease, asplenia (absence of a functioning spleen), or immunocompromising conditions
• Meningococcal B vaccine (MenB, protecting against serogroup B strains not covered by MenACWY): Recommended for adults with complement component deficiencies or asplenia
• RSV vaccine (Respiratory Syncytial Virus vaccine): Recommended for pregnant people between 32 and 36 weeks gestation; not routinely recommended for non-pregnant adults under age 60

Chronic Conditions That Expand the Vaccine List for Adults of Any Age

The following conditions each trigger one or more additional vaccine recommendations, applicable to adults regardless of which age bracket they fall in.

Adults who are newly diagnosed with any of these conditions should review their full vaccination history with their provider promptly, because the window for optimal protection is always before an infection occurs.

Turning 50: Shingrix Becomes a Routine Recommendation

All adults starting at age 50 are routinely recommended to receive the Shingrix shingles vaccine, regardless of prior chickenpox history or prior Zostavax vaccination. Shingrix is given as 2 doses separated by 2 to 6 months and is more than 90% effective at preventing shingles and postherpetic neuralgia across all age groups above 50.

Age calculator is available online for free, at AgeFinder. This free age calculator computes age in terms of years, months, weeks, days, hours, minutes, and seconds, given a date of birth.

Shingrix is a recombinant subunit vaccine (a type that uses specific protein pieces of the pathogen rather than a live or weakened virus, producing a strong immune response without risk of causing the disease). The older live shingles vaccine, Zostavax, is no longer available in the United States and is not considered adequate prior protection.

Why Shingles Risk Rises Sharply After Age 50

Shingles (herpes zoster) occurs when the varicella-zoster virus, which remains dormant in nerve tissue after a chickenpox infection, reactivates as the immune system weakens with age. Approximately 1 in 3 Americans will develop shingles during their lifetime, with risk rising steeply after age 50. Prior shingles episodes do not protect against recurrence, and vaccination after a shingles episode is still recommended.

Postherpetic neuralgia (persistent nerve pain lasting months or years after the shingles rash resolves) affects approximately 10 to 18% of shingles patients overall, with rates climbing significantly in older adults. Shingrix reduces postherpetic neuralgia risk by more than 89% in adults aged 50 to 69.

Adults who are immunocompromised and aged 19 and older (not just 50 and older) are also recommended to receive Shingrix, because weakened immune systems cannot reliably suppress the dormant varicella-zoster virus. This includes adults receiving chemotherapy, TNF inhibitors (drugs that suppress tumor necrosis factor, a protein central to immune system signaling), JAK inhibitors, high-dose corticosteroids, calcineurin inhibitors, or mycophenolate mofetil.

Turning 65: Pneumococcal and RSV Protection Join the Routine Schedule

At age 65, all adults are routinely recommended to receive pneumococcal vaccine and a single-dose RSV vaccine for the first time, regardless of prior health status. These two additions join the annual flu shot, COVID-19 vaccine, Shingrix, and Tdap/Td booster as standard expectations at this age.

Pneumococcal disease (illness caused by Streptococcus pneumoniae bacteria, including pneumonia, meningitis, and bloodstream infections) is a leading cause of hospitalization and death among older U.S. adults. The CDC recommends one of two approaches for adults 65 and older who have never received a pneumococcal conjugate vaccine:

• PCV20 alone (a single pneumococcal conjugate vaccine covering 20 strains, preferred for simplicity)
• PCV15 followed by PPSV23 (a two-vaccine sequence; the PPSV23 polysaccharide vaccine is given at least 1 year after PCV15)

RSV (Respiratory Syncytial Virus, a respiratory pathogen that causes mild cold-like illness in healthy adults but severe lower respiratory disease in older adults) causes approximately 177,000 hospitalizations and 14,000 deaths among U.S. adults 65 and older annually. The RSV vaccine (Abrysvo or mResvia, both approved for adults 60 and older) is given as a single lifetime dose.

Pneumococcal Sequencing: Getting the Order Right

Pneumococcal vaccine sequencing rules are among the more complex in the adult schedule. The correct approach depends entirely on what an adult has already received.

For adults who reach 65 with no prior pneumococcal vaccination:

1. Receive PCV20 alone (preferred single-step approach), OR
2. Receive PCV15 now, then PPSV23 at least 1 year later

For adults who received PPSV23 before age 65 (for a medical condition) but never received a conjugate vaccine:

• Receive PCV20 or PCV15 at least 1 year after the prior PPSV23 dose
• No additional PPSV23 is needed after PCV20

For adults who previously received PCV13 (an older conjugate vaccine no longer routinely recommended):

• Receive PCV20 or follow the PCV15 + PPSV23 sequence, observing minimum interval rules
• Providers use CDC footnote tables to determine exact timing

Adults who are uncertain about their prior pneumococcal history can safely receive PCV20. Receiving an additional conjugate dose in someone already vaccinated carries no identified harm.

Vaccines Driven by Occupation and Lifestyle

Age alone does not fully determine an adult’s vaccine needs. A person’s job, travel destinations, and certain behaviors create exposures the age-based schedule does not capture.

Healthcare Workers

Healthcare workers represent one of the most extensively vaccinated occupational groups in the United States due to both ACIP recommendations and institutional employment requirements.

• Hepatitis B: Required in most healthcare employment settings; a post-series serologic titer (anti-HBs of 10 mIU/mL or greater) is recommended to confirm an immune response was produced
• Influenza: Annual vaccination required by most hospitals and health systems; inactivated injectable flu vaccine is required for workers in immunocompromised patient care settings
• MMR: 2 documented doses required, or a positive serologic titer as alternative evidence
• Varicella: 2 documented doses required, or a positive titer
• Tdap: 1 dose required; standard adult booster cycle thereafter
• Meningococcal: Recommended for microbiologists and laboratory personnel who routinely handle live Neisseria meningitidis cultures

Travel-Related Vaccines

International travel to certain destinations triggers vaccine recommendations that carry no age threshold. Adults planning international travel should consult a travel medicine specialist or visit a travel clinic at least 4 to 6 weeks before departure, since some vaccines require multiple doses administered over several weeks.

Behavioral and Lifestyle Risk Factors

Certain behaviors and social circumstances increase the risk of vaccine-preventable diseases independently of age.

• Adults who inject drugs: Hepatitis A (2 doses), Hepatitis B (3 doses), meningococcal vaccines based on living situation
• Adults with multiple sexual partners or men who have sex with men (MSM): Hepatitis A, Hepatitis B, MenACWY, MenB, HPV (routinely through 26, shared decision through 45)
• Adults experiencing homelessness: Hepatitis A (elevated outbreak risk), Hepatitis B, pneumococcal if chronic conditions are present
• Adults who smoke cigarettes (ages 19 to 64): Pneumococcal vaccine recommended prior to the routine recommendation at 65

Pregnancy Changes the Schedule at Every Trimester

Pregnant adults in the United States are recommended to receive specific vaccines during each pregnancy to protect both themselves and their newborns. The timing within pregnancy matters for several of these vaccines.

• Flu vaccine: Recommended during any trimester; inactivated formulation only (LAIV nasal spray is not used during pregnancy)
• Tdap: Recommended between 27 and 36 weeks of every pregnancy, not just the first, to maximize transfer of pertussis antibodies to the newborn before birth
• Abrysvo (RSV vaccine): Recommended between 32 and 36 weeks gestation to protect the newborn during the first months of life; this is the only RSV vaccine formulation approved for use in pregnancy
• COVID-19: Recommended during pregnancy; the CDC cites evidence of increased risk of severe illness, preterm birth, and other adverse outcomes in pregnant people with COVID-19

All live vaccines, including MMR, varicella, and the LAIV nasal flu spray, are contraindicated (must not be given) during pregnancy. Women who need MMR or varicella catch-up doses should receive them at least 4 weeks before becoming pregnant or immediately after delivery.

Immunocompromising Conditions Require Specific Adjustments

Adults with weakened immune systems need a substantially modified approach to vaccination. The core principle is that live vaccines are contraindicated in severely immunocompromised adults, while inactivated vaccines may require additional doses because the immune response may be weaker.

Important: Live vaccines (vaccines that use a weakened but living form of a pathogen) are contraindicated in people with severely weakened immune systems because even a weakened pathogen can cause disease when the immune system cannot mount an adequate defense.

Immunosuppressive medications that specifically require avoidance of live vaccines include:

• High-dose corticosteroids (prednisone 20 mg/day or greater for 2 weeks or longer)
• Biologic agents including TNF inhibitors (adalimumab, etanercept, infliximab), IL-6 inhibitors, IL-17 inhibitors, and JAK inhibitors (tofacitinib, baricitinib, upadacitinib)
• Chemotherapy agents used in cancer treatment
• Calcineurin inhibitors used in transplant recipients (tacrolimus, cyclosporine)
• Mycophenolate mofetil and other antimetabolite immunosuppressants

Adults who are about to begin immunosuppressive therapy should receive any outstanding live vaccines at least 4 weeks before starting treatment and any outstanding inactivated vaccines at least 2 weeks before starting treatment, to allow the immune system time to mount a protective response while it is still functioning normally.

Adults with HIV infection who have CD4 counts above 200 cells/mm³ can generally receive MMR and varicella safely. Those with CD4 counts below 200 should not receive live vaccines.

What to Expect From Vaccine Side Effects

Many adults delay or decline vaccination due to concerns about side effects. Most reactions are normal immune responses and resolve within 1 to 3 days.

Normal and expected reactions after most adult vaccines:

• Local reactions: Redness, soreness, swelling, or warmth at the injection site
• Systemic reactions: Mild fever, fatigue, headache, or muscle aches appearing within 12 to 24 hours

Shingrix produces notably stronger systemic reactions than most other adult vaccines. Clinical trial data shows approximately 10 to 17% of Shingrix recipients experience reactions severe enough to temporarily limit normal daily activities. This is an expected sign of a robust immune response, not a safety concern.

Taking an over-the-counter analgesic such as ibuprofen or acetaminophen after Shingrix is reasonable and does not meaningfully reduce the vaccine’s efficacy.

Rare Reactions and When to Seek Emergency Care

Adults who experience hives, difficulty breathing, throat swelling, or loss of consciousness within 15 to 30 minutes of vaccination should seek emergency care immediately. This is why providers ask all vaccinated adults to remain on-site for 15 minutes after administration, or 30 minutes for those with a prior history of allergic reactions to any vaccine or vaccine component.

Allergy and Ingredient Considerations

Adults with egg allergies can safely receive all currently recommended flu vaccines. The CDC removed most egg-allergy precautions after data consistently showed the quantity of egg protein in flu vaccines is too small to trigger reactions even in people with documented egg allergies.

Adults with a documented allergy to a specific vaccine ingredient (such as neomycin, gelatin, polysorbate 80, or latex from certain vial stoppers) should discuss this with their provider before receiving that vaccine. True contraindications based on ingredient allergies are rare. Most documented vaccine “allergies” in medical records are actually prior side effects (such as injection site soreness) and not true allergic reactions.

How the Adult Schedule Is Developed and Updated

The ACIP (Advisory Committee on Immunization Practices) meets three times per year in Atlanta, Georgia at CDC headquarters. All ACIP meetings are open to the public and livestreamed on the CDC website. Voting members review clinical trial data, epidemiological surveillance, cost-effectiveness analyses, and post-market safety data before making recommendations by majority vote.

After ACIP votes, the CDC Director must independently concur before the recommendation becomes official CDC guidance. This typically occurs within weeks of the ACIP vote. Recommendations are then published in the CDC’s Morbidity and Mortality Weekly Report (MMWR), the agency’s primary peer-reviewed scientific publication.

Mid-year schedule updates occur whenever ACIP votes on a new vaccine or revises an existing recommendation during any of its three annual meetings. Adults and clinicians should check the CDC’s current schedule at least once yearly rather than relying on older printed versions.

Where Adults Fall Short: Coverage Data and Persistent Gaps

Adult vaccination rates in the United States fall consistently below the targets set by Healthy People 2030, the federal initiative that establishes decade-long national health improvement goals.

• Flu vaccine coverage among adults 18 and older hovers around 49% in recent seasons, well below the 70% Healthy People 2030 target
• Shingrix coverage among adults 50 and older reached approximately 36% despite efficacy exceeding 90%
• Pneumococcal vaccine coverage among adults 65 and older reached roughly 72% for older formulations; comprehensive data for the newer PCV20 recommendation is still being collected
• Hepatitis B series completion rates among adults remain low, with many adults unaware they were never vaccinated during childhood
• HPV vaccine coverage among adults 19 to 26 who were not vaccinated during adolescence is approximately 26%, representing a substantial missed cancer prevention opportunity

Coverage gaps are not uniform. CDC surveillance data consistently shows lower vaccination rates among adults without health insurance, adults in rural areas, adults without a regular primary care provider, and certain racial and ethnic populations who face systemic barriers to healthcare access.

Why Adults Skip Recommended Vaccines

Insurance Coverage and Cost for Adult Vaccines

Most recommended adult vaccines are available at no out-of-pocket cost under several distinct coverage pathways depending on a person’s insurance situation.

Private insurance (non-grandfathered plans): The Affordable Care Act requires coverage of all ACIP-recommended vaccines with $0 cost-sharing when received from an in-network provider. Grandfathered plans (those that existed before the ACA and have not made significant changes) may not be required to follow this rule.

Medicare Part B: Covers the annual flu vaccine, COVID-19 vaccine, and hepatitis B vaccine at $0 for all Medicare beneficiaries.

Medicare Part D: Covers most other ACIP-recommended vaccines at $0 for Medicare beneficiaries, including Shingrix, pneumococcal, RSV, Tdap, and others. As of January 2023, the Inflation Reduction Act eliminated cost-sharing for Part D-covered vaccines recommended by ACIP.

Medicaid: Covers most adult vaccines, though coverage varies by state for some vaccines beyond the core recommendations.

Uninsured adults: The Bridge Access Program, launched by the CDC in 2023, provided free COVID-19 vaccines to uninsured and underinsured adults. Federally Qualified Health Centers (FQHCs), state and local health departments, and participating retail pharmacies offer many vaccines at reduced or no cost through various programs. Adults without insurance should call their local health department to ask about current availability.

How to Track and Store Your Vaccination Records

Lost vaccination records are one of the most common barriers to efficient adult immunization. Several options exist for recovering and maintaining records.

Most states operate an Immunization Information System (IIS), also called a vaccine registry (a confidential, population-based database that stores records of vaccinations administered by participating providers). Adults can request their IIS records through their state health department’s website. Records may be incomplete if certain providers do not report to the state IIS.

Practical steps for maintaining a complete adult vaccination record:

1. Request a printed vaccine summary from the provider or pharmacist after every vaccination
2. Store paper records with other important documents such as insurance cards and birth certificates
3. Photograph or scan records and store digitally in a secure, backed-up location
4. Ask your pharmacy to add each vaccine to your patient profile and print a copy after every visit
5. Register with your state’s IIS patient portal if one is available in your state
6. Inform your primary care provider of any vaccines received at pharmacies or travel clinics, since these often do not automatically appear in the provider’s electronic health record

How to Read a Vaccination Record

Vaccination records use abbreviations that can be confusing for adults reviewing their own history.

Full Adult Schedule at a Glance

The adult vaccine schedule is updated at least once annually. Checking the current version at cdc.gov at the time of an annual wellness visit is the most reliable way to stay current.

FAQs

What vaccines do adults need every year?

All adults 19 and older need an annual influenza (flu) vaccine and should receive the updated COVID-19 vaccine formulation each year as recommended by the CDC. These are the only two vaccines on the adult schedule requiring yearly administration. All other adult vaccines follow a one-time, series-based, or interval-based schedule rather than an annual one.

At what age do adults need the shingles vaccine?

The CDC recommends Shingrix for all adults starting at age 50, given as 2 doses separated by 2 to 6 months. It is recommended even for adults who have already had shingles or who previously received the older Zostavax vaccine, which is no longer available in the United States. Immunocompromised adults aged 19 and older are also recommended to receive Shingrix.

Does a 30-year-old need the HPV vaccine?

Adults aged 27 to 45 are not routinely recommended to receive the HPV vaccine, but the CDC supports shared clinical decision-making in this group. A provider and patient can decide together whether vaccination is worthwhile based on the individual’s likelihood of new HPV exposures. Adults through age 26 receive the HPV vaccine as a routine recommendation without needing this individualized conversation.

What vaccines do adults over 65 need?

Adults 65 and older are routinely recommended to receive the annual flu shot, the updated COVID-19 vaccine, Shingrix (2 doses if not previously completed), a pneumococcal vaccine (PCV20 alone or PCV15 followed by PPSV23 at least 1 year later), and a single lifetime dose of RSV vaccine. Tdap or Td boosters every 10 years continue throughout life regardless of age.

Are adult vaccines covered by insurance?

Most ACIP-recommended adult vaccines are covered at $0 out-of-pocket under the Affordable Care Act’s preventive services mandate for non-grandfathered private insurance plans. Medicare Part B covers flu, COVID-19, and hepatitis B at no cost. Since January 2023, Medicare Part D covers all ACIP-recommended vaccines including Shingrix at $0 for beneficiaries, following changes made by the Inflation Reduction Act.

Do adults need the MMR vaccine?

Adults born in 1957 or later who lack documented evidence of immunity need at least 1 dose of MMR. Healthcare workers and international travelers typically need 2 documented doses. Adults born before 1957 are generally considered immune to measles and mumps based on the likelihood of prior natural infection during that era.

What is the Tdap booster schedule for adults?

Adults who have never received Tdap should receive 1 dose, then a Td or Tdap booster every 10 years for life. Pregnant people should receive Tdap between 27 and 36 weeks of every pregnancy to pass pertussis antibodies to the newborn before birth. Adults with a wound, puncture, or burn should receive a Td or Tdap booster if more than 5 years have passed since their last dose, regardless of the regular 10-year schedule.

Does a healthy adult need the pneumococcal vaccine before age 65?

Healthy adults without specific medical conditions are not routinely recommended for pneumococcal vaccines until age 65. However, adults 19 to 64 with diabetes, heart disease, chronic lung disease, asplenia, cochlear implants, cerebrospinal fluid leaks, or immunocompromising conditions are recommended to receive pneumococcal vaccines before reaching 65. Cigarette smokers aged 19 to 64 are also recommended to receive pneumococcal vaccine.

What vaccines do pregnant women need?

Pregnant people are recommended to receive the inactivated flu vaccine during any trimester, Tdap between 27 and 36 weeks of every pregnancy, Abrysvo RSV vaccine between 32 and 36 weeks gestation, and the updated COVID-19 vaccine. All live vaccines including MMR, varicella, and the LAIV nasal flu spray are contraindicated during pregnancy and should be given at least 4 weeks before conception or immediately postpartum.

Is the hepatitis B vaccine still recommended for adults?

Yes. All unvaccinated adults through age 59 are routinely recommended to complete the hepatitis B series. Adults 60 and older may receive it based on shared decision-making with their provider or based on specific risk factors such as diabetes, chronic liver disease, end-stage renal disease, or occupational exposure. The standard series is 3 doses; the Heplisav-B formulation requires only 2 doses for adults 18 and older.

Can adults get vaccines at a pharmacy?

Yes. Pharmacies throughout the United States are authorized to administer most adult vaccines including flu, COVID-19, Shingrix, pneumococcal, RSV, Tdap, hepatitis A and B, and others. Specific availability varies by state and pharmacy location. Insurance coverage rules apply in the same way as a provider office visit, meaning most recommended vaccines should be $0 under ACA-compliant plans when received in-network.

What happens if an adult has never been vaccinated at all?

An unvaccinated adult can receive catch-up vaccinations at any age following CDC catch-up schedule guidance. Most vaccines can be administered simultaneously at the same appointment with no reduction in efficacy and no meaningful increase in side effects. A provider uses the adult immunization schedule and its footnotes to create a safe, prioritized catch-up plan based on the person’s age, health conditions, and most pressing exposure risks.

How do I know if I am immune to chickenpox without vaccination records?

A blood test called a varicella titer (a serologic test measuring antibodies to the varicella-zoster virus to confirm immune status) can determine whether immunity exists. A positive titer means the vaccine is not needed. Adults born in the United States before 1980 are generally assumed to have prior natural infection and are considered immune by the CDC, with exceptions for healthcare workers who require documented proof regardless of birth year.

What vaccines are recommended for adults with diabetes?

Adults with diabetes (Type 1 or Type 2) are recommended to receive all routine age-based vaccines plus the hepatitis B series if not previously vaccinated, pneumococcal vaccines beginning at age 19 rather than waiting until 65, and close attention to annual flu vaccination given the elevated risk of influenza-related complications in this population. Shingrix is recommended at age 50 as it is for all adults.

Do I need a meningitis vaccine as an adult?

MenACWY (meningococcal conjugate vaccine) is recommended for adults with asplenia, complement component deficiencies, HIV infection, or microbiological occupational exposure, and for college freshmen in campus housing who were not vaccinated at age 16 or later. MenB is recommended for adults with asplenia, complement deficiencies, or in the context of a community outbreak. Neither vaccine is routinely recommended for the general adult population without these specific indications.

Can I receive multiple vaccines at the same appointment?

Yes. The CDC explicitly states that most adult vaccines can and should be administered at the same visit when multiple are due, with no reduction in effectiveness and no meaningful increase in adverse effects. Giving multiple vaccines at one appointment is considered best practice because it reduces missed opportunities and minimizes the total number of healthcare visits required. There are very few timing exceptions, most of which involve spacing rules for live vaccines that cannot be given on the same day if not administered simultaneously.

What is VAERS and should I report a vaccine reaction?

VAERS (Vaccine Adverse Event Reporting System) is a national vaccine safety monitoring system co-managed by the CDC and the FDA that collects reports of health events occurring after vaccination. Any person, including patients, family members, and healthcare providers, can submit a report at vaers.hhs.gov. A VAERS report does not mean the vaccine caused the reaction, but submissions help identify patterns that may require further investigation. Healthcare providers are legally required to report certain specific adverse events; patients and caregivers are encouraged but not legally required to report.

How often does the adult vaccine schedule change?

The CDC updates the adult immunization schedule at least once annually, typically publishing a new version in the first quarter of each calendar year. Additional mid-year updates occur when ACIP votes on new vaccines or revised recommendations during any of its three annual meetings. Major recent changes include the addition of RSV vaccines for older adults and pregnant people, the replacement of PCV13 with PCV15 and PCV20 for pneumococcal recommendations, and ongoing revisions to COVID-19 booster guidance. Adults and providers should check cdc.gov for the most current version rather than relying on printed materials from prior years.

What vaccines does an adult need after their spleen is removed?

Adults who undergo splenectomy (surgical removal of the spleen, which plays a central role in filtering bacteria from the bloodstream) face lifelong increased risk of severe infections from encapsulated bacteria. The CDC recommends MenACWY (2 doses given at least 8 weeks apart, then boosters every 5 years), MenB, and updated pneumococcal vaccines. These vaccines should be administered at least 2 weeks before a planned splenectomy or as soon as clinically feasible after an emergency splenectomy.

What is the difference between PCV20 and PPSV23?

PCV20 is a pneumococcal conjugate vaccine (meaning the bacterial antigens are chemically linked to a carrier protein, producing a stronger and longer-lasting immune response) covering 20 strains of Streptococcus pneumoniae. PPSV23 is a polysaccharide vaccine (using bacterial antigens without a carrier protein) covering 23 strains but producing a weaker immune response in older adults and no immune memory. For adults 65 and older with no prior pneumococcal vaccination, PCV20 alone is the preferred approach because it eliminates the need for a two-step sequence while providing broad strain coverage.