Is the 21-valent pneumococcal conjugate vaccine an option for some U.S. adults?
The 21-valent pneumococcal conjugate vaccine (PCV21) is a specific option for adults in the United States. It was approved by the Food and Drug Administration for adults aged 18 years and older in June 2024 7. This vaccine adds eight new serotypes compared to other licensed vaccines and does not contain certain serotypes found in other options 7.
What the research says
The Advisory Committee on Immunization Practices (ACIP) recommended a single dose of PCV21 as an option for adults aged 19 years and older for whom a pneumococcal conjugate vaccine is currently recommended 7. This recommendation applies to adults aged 65 years and older, as well as adults aged 19 to 64 years with certain risk conditions for pneumococcal disease 7.
Before October 2024, options included either the 20-valent PCV alone or the 15-valent PCV in series with the 23-valent pneumococcal polysaccharide vaccine 8. On October 23, 2024, ACIP expanded the recommendation to include a single dose of PCV for all PCV-naïve adults aged 50 years and older 8. This update means PCV21 is now an option for a broader age group of adults who have not previously received a pneumococcal conjugate vaccine 8.
Earlier studies and safety data support the use of investigational 21-valent vaccines in adults. A Phase I study in Japanese healthy adults found that the vaccine was safe and well-tolerated, with adverse events mostly being mild and lasting three days or less 9.
What to ask your doctor
- Am I eligible for the 21-valent pneumococcal conjugate vaccine based on my age and health conditions?
- Does my vaccination history affect which pneumococcal vaccine option is best for me?
- What are the benefits of the 21-valent vaccine compared to the 20-valent or 15-valent options?
- Is the 21-valent vaccine recommended for me if I am between 19 and 64 years old with a risk condition?
This question is drawn from common patient questions about Pulmonology & Critical Care and answered using cited medical research. We do not provide individualized advice.