What is the booster schedule for Pneumococcal Polysaccharide vaccine for those who are 65 and older?

For individuals aged 65 and older, the Pneumococcal Polysaccharide vaccine typically requires a one-time revaccination. This recommendation is based on the need to ensure adequate protection against pneumococcal disease, especially as the immune response may diminish over time in older adults.

The initial vaccination is usually administered at or after age 65, and if the individual was vaccinated before the age of 65, revaccination is generally recommended five years after their last dose, but only if that initial dose was the polysaccharide vaccine. This schedule is designed to reinforce immunity in a population that is at elevated risk for severe illness from pneumococcal infections, including pneumonia.

The correct response reflects the guidance around the timing of revaccination to maintain optimal immunity in older adults.