Different types of pneumococcal vaccines
Six different pneumococcal vaccines are currently available in Finland. Five of these are conjugate vaccines (PCV10, PCV13, PCV15, PCV20 and PCV21), while one is a polysaccharide vaccine (PPV23). The vaccines differ in the number of pneumococcal serotypes they protect against, and there are also differences in the duration of protection provided by the vaccines. The number in the vaccine's name indicates how many different pneumococcal serotypes the vaccine protects against.
Pneumococcal conjugate vaccines (PCV10, PCV13, PCV15, PCV20 and PCV21) are newer types of pneumococcal vaccines. Conjugate vaccines provide long-term protection against pneumococcal diseases. They also protect the mucous membranes and the nasopharynx against pneumococcal carriage.
The pneumococcal polysaccharide vaccine (PPV23) is the oldest type of pneumococcal vaccine. It provides protection against 23 of the most common pneumococcal serotypes, but the protection is relatively short-lived. The vaccine's protective effect lasts for approximately five years. The effectiveness of the polysaccharide vaccine against pneumonia is less well established than that of conjugate vaccines.
New PCV21 pneumococcal vaccine available for adults
The primary option for everyone over 18 is the PCV21 vaccine, which provides broad and long-lasting protection against different pneumococcal serotypes. The vaccine became available in Finland in 2025. It is administered as a single dose, and there is currently no information indicating a need for a booster dose.
The effectiveness of the new PCV21 vaccine is based on the protection it provides against the following pneumococcal serotypes: 3, 6A, 7F, 8, 9N, 10A, 11A, 12F, 15A, 15B, 16F, 17F, 19A, 20A, 22F, 23A, 23B, 24F, 31, 33F and 35B. There are 21 serotypes in total, eight of which are included only in the newer PCV21 vaccine.
PCV20 pneumococcal vaccine is suitable for children and adults
The primary option for people under 18 is the PCV20 vaccine. The vaccine can be given to infants from 6 weeks of age. It is also an alternative option for adults over 18 instead of the PCV21 vaccine.
PCV20 contains the same pneumococcal serotypes as PCV13, plus seven additional serotypes (serotypes 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15B, 18C, 19A, 19F, 22F, 23F and 33F).