Most adults need only one or two pneumonia vaccine doses in their lifetime, not repeated shots every few years. The exact number depends on which vaccine you receive, your age, and whether you have certain health conditions. This is very different from the flu shot, which you need annually. Once your pneumococcal vaccination series is complete, you’re generally done for good.
What Most Adults Need
All adults are recommended to get a pneumococcal vaccine at age 50 or older. The simplest path is a single dose of PCV20 or the newer PCV21. With either of these vaccines, one shot completes your pneumococcal vaccination and no follow-up doses are needed.
The other option is PCV15, which requires a second shot of a different vaccine (PPSV23) at least one year later. That two-dose sequence also completes your vaccination. So depending on which vaccine your pharmacy or clinic carries, you’ll need either one visit or two visits spaced about a year apart.
Who Should Get Vaccinated Before Age 50
Adults between 19 and 49 don’t routinely need the vaccine unless they have specific risk factors. Conditions that qualify you for earlier vaccination include:
- Immunocompromising conditions: HIV, sickle cell disease, a missing or nonfunctional spleen, conditions requiring immunosuppressive drugs or radiation therapy
- Chronic organ conditions: kidney failure, nephrotic syndrome
- Other risk factors: cochlear implants, cerebrospinal fluid leaks
If you fall into one of these categories, the vaccine schedule and timing are the same as for older adults. You receive PCV20 or PCV21 (one dose, done) or PCV15 followed by PPSV23. The key difference is that people with immunocompromising conditions, cochlear implants, or cerebrospinal fluid leaks can get the two doses closer together, with a minimum gap of just 8 weeks instead of the standard one year.
If You Already Received an Older Vaccine
Pneumococcal vaccine recommendations have changed over the years, so many people received PCV13 or PPSV23 in the past and aren’t sure if they need more. The answer depends on what you’ve already had and your health status.
If you previously received both PCV13 and one dose of PPSV23, and you have an immunocompromising condition, cochlear implant, or cerebrospinal fluid leak, one additional dose of PCV20 or PCV21 is recommended. You should wait at least 5 years after your most recent pneumococcal vaccination before getting it. After that, you’re done.
If you received PCV13 and PPSV23 but have a different risk condition (not immunocompromising), no additional vaccines are recommended until you reach age 50. At that point, your provider will review whether you need anything else.
If you received PPSV23 in the past but never got a newer conjugate vaccine like PCV15 or PCV20, you may still benefit from one of those. Your provider can help sort out the timing based on when you last received a pneumococcal shot.
Why You Don’t Need It Every Year
Unlike the flu vaccine, which targets viruses that mutate rapidly each season, pneumococcal vaccines protect against bacterial strains that are relatively stable. The newer vaccines (PCV20 and PCV21) cover 20 and 21 strains of pneumococcal bacteria respectively, and the immune protection they generate is long-lasting. That’s why the CDC considers your vaccination “complete” after the recommended doses, with no routine boosters on the calendar.
This is one of the most common points of confusion. People hear “pneumonia vaccine” and assume it works like the flu shot. It doesn’t. For the vast majority of adults, this is a one-time event.
The Children’s Schedule Is Different
Infants and young children do receive multiple doses of pneumococcal vaccine as part of their routine immunization series. The pediatric schedule typically involves doses at 2, 4, 6, and 12 through 15 months of age. This multi-dose series is standard for many childhood vaccines because young immune systems need repeated exposure to build strong, lasting protection. Once the childhood series is complete, no additional pneumococcal doses are needed until adulthood, and only then if age or health conditions make it appropriate.
One Dose or Two: Which Vaccine to Choose
If you have the choice, PCV20 or PCV21 offers the most straightforward path. One shot, no follow-up, you’re finished. PCV15 works well too, but it covers fewer bacterial strains on its own, which is why it requires the PPSV23 booster a year later to round out your protection.
In practice, you may not get to choose. Many pharmacies and clinics stock whichever vaccine their supplier carries. If you end up with PCV15, just make sure to schedule your follow-up PPSV23 dose about a year later. Set a reminder, because the second dose is easy to forget and your protection isn’t complete without it.