The CDC, on 10/24/2024, recently updated their guidelines on vaccination against pneumococcal disease. They have lowered the recommended age for adult vaccination from 65 to 50. This is based on analysis of data from the ACIP (Advisory Committee on Immunization Practices.) For people at higher risk of pneumonia, such as people with asthma, or having an immunocompromised condition, even if younger than 50, it is recommended to get a booster every 5 years. We have been using pneumococcal vaccines in children and adults for over two decades, and they are felt to be safe and efficacious in preventing disease. The vaccines are targeted against a bacteria, Streptococcus pneumoniae, which is a common cause of respiratory tract infections, but can also occasionally cause more severe disease including bacteremia, pneumonia, or meningitis.
The vaccines have been adjusted over time, as circulating strains of the bacteria have changed. Traditionally, we were using PCV13, followed a year later by PPSV23. Over the last 2-3 years, however, we have transitioned over to using a single dose of PCV20 in most adults. The number in the vaccine name refers to the number of strains covered by the vaccine. If you already received the combination of PCV13 and PPSV23, or the single dose of PCV20, then you are considered to be adequately protected. In July of 2024, the CDC approved a newer vaccine from Merck, called PCV21.
At this time, we agree with the CDC’s recommendation that adults ages 50 and older receive either PCV20 or PCV21. If you got PCV20, it is not recommended, nor needed, to get the new Merck vaccine (PCV21.) We will stock both in our office. These are considered to be a “once only” vaccination, meaning that they don’t require boosters in the future (unless the person is at higher risk, as stated above.) That being said, however, older adults do occasionally opt for a booster if it’s been many years since the original vaccination (which used to be at age 65.)
Please let us know if you have any questions. We know that this issue is a little complicated, and the above vaccine names may look like word salad!
As always, we are here for you if you have any questions or concerns.
Warmest regards,
Your team at Peninsula Doctor, Ian Kroes MD, David Hiroshima MD, Judy Kim MD
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