When Are Adult Vaccinations Needed?
All adults require specific vaccinations based on their age, with universal annual influenza vaccination for everyone ≥19 years, and additional vaccines determined by age milestones, underlying medical conditions, occupational exposures, and lifestyle risk factors. 1, 2
Age-Based Vaccination Framework
Universal Recommendations (All Adults ≥19 Years)
- Influenza vaccine: 1 dose annually, every year without exception 1, 2
- Tdap/Td: Single Tdap dose if never received, then Td or Tdap booster every 10 years 1
- COVID-19: Updated vaccine doses based on current CDC guidance (1+ doses for ages 19-64; 2+ doses for ≥65 years) 2
Age 19-26 Years
- HPV vaccine: 2-3 doses depending on age at initiation (routine through age 26 for both males and females) 1, 3
- Meningococcal vaccines: Based on risk factors; MenB may be given ages 16-23 (preferably 16-18) via shared clinical decision-making 3
Age 27-49 Years
- HPV vaccine: May be given ages 27-45 based on shared clinical decision-making and ongoing risk assessment 1
- Continue routine Td/Tdap and annual influenza
Age 50-64 Years
- Zoster (shingles) vaccine: 2-dose RZV series starting at age 50 (preferred over ZVL) 3
- Continue all routine vaccines
Age ≥65 Years
- Pneumococcal vaccines: PCV (PCV13, PCV15, PCV20, or PCV21) followed by PPSV23 if indicated, with specific timing intervals 1, 2
- High-dose or adjuvanted influenza vaccines: Preferentially recommended over standard-dose 2
- Zoster vaccine: If not previously received
- All other routine vaccines continue
Medical Condition-Based Indications
Immunocompromising Conditions
Require enhanced vaccination schedules including:
- PCV13/PCV15/PCV20/PCV21 followed by PPSV23 (at least 8 weeks later) 4
- 3-dose HPV series through age 26 4
- Meningococcal vaccines (MenACWY and MenB) 3
- Contraindications: Live vaccines (MMR, varicella, ZVL, LAIV) are contraindicated 3, 1
Chronic Medical Conditions
Adults with diabetes, heart disease, lung disease, chronic liver disease, or chronic kidney disease need:
- Pneumococcal vaccination (any age if at increased risk) 5
- Annual influenza vaccination 5
- Hepatitis B vaccination (especially with diabetes or liver disease) 5
Asplenia or Complement Deficiencies
- PCV13 followed by PPSV23 4
- Meningococcal vaccines (both MenACWY and MenB) 3
- Haemophilus influenzae type b (Hib) vaccine 1
Behavioral and Occupational Indications
Healthcare Personnel
- Hepatitis B: 2-3 dose series (coverage remains suboptimal at 67.2% as of 2018) 6
- Annual influenza (IIV or RIV, not LAIV if caring for severely immunocompromised patients) 4
- MMR: 2 doses if born in 1957 or later; consider for those born before 1957 without immunity 7
- Varicella: 2 doses if no evidence of immunity 3
Men Who Have Sex With Men
- Hepatitis A: 2-3 dose series 5
- Hepatitis B: 2-3 dose series 5
- HPV: Through age 26 4, 7
- Meningococcal vaccines 3
International Travelers
- Hepatitis A: For travel to countries with high/intermediate endemicity 4, 5
- Hepatitis B: Based on destination and activities 5
- Other travel-specific vaccines as indicated
Pregnancy-Specific Recommendations
Tdap vaccine: 1 dose during each pregnancy, preferably at 27-36 weeks gestation, regardless of interval since prior Td/Tdap 4, 1
Contraindicated vaccines during pregnancy: MMR, varicella, ZVL, LAIV 3, 1
May be indicated if benefit outweighs risk: Inactivated polio vaccine (IPV) 2
Critical Implementation Points
Common Pitfalls to Avoid
- Assuming birth before 1957 confers measles/mumps immunity for healthcare workers - they still need documented immunity or vaccination 7
- Delaying pneumococcal vaccination - should be given to all adults ≥65 years and younger adults with risk factors 1
- Missing Tdap in pregnancy - required each pregnancy, not just once in lifetime 4, 1
- Forgetting annual influenza - required every single year for all adults 1
Access Barriers and Solutions
Evidence shows vaccination coverage remains critically low despite recommendations, with only 13.5-20.2% of adults receiving all age-appropriate vaccines 6. Key factors associated with higher coverage include:
- Having health insurance (though even insured adults with ≥10 physician visits show 20-87% non-vaccination rates) 6, 8
- Having a usual source of care 8
- Provider recommendation and standing orders 9
Documentation Requirements
Self-report of previous vaccine doses is acceptable for most vaccines, including IPV 2. However, healthcare personnel and pregnant women require documented evidence of immunity for certain vaccines like MMR and varicella 7, 3.
Special Populations
Foreign-Born Adults
Generally have lower vaccination coverage than U.S.-born adults across most vaccines 6, 8. Require complete assessment of vaccination history and catch-up vaccination as indicated.
Adults Without Documentation
Treat as unvaccinated and begin/complete primary series. There is no harm in revaccinating someone who may have been previously vaccinated 4.