The frequency of pneumonia (pneumococcal) vaccination depends on your age, health status, and whether you've previously been vaccinated.

For Adults

• Most adults need one to two doses of the pneumococcal vaccine, with the second dose typically given 1 to 5 years after the first if recommended based on health status or risk factors. The vaccine is generally considered to provide long-term or lifelong immunity after the full series, especially in healthy individuals over 65 or those with underlying health conditions.

• Adults over 65 years are recommended to receive at least one dose , with additional doses depending on previous vaccination history and risk factors.

For Children

• Children younger than 5 years should follow a series of 4 doses given at 2 months, 4 months, 6 months, and 12-15 months of age.

Key Notes

• The need for booster doses in adults is based on individual health and previous vaccination history, generally ranging from one to three doses over a lifetime.

• For specific schedules based on health conditions or special risk groups, consulting with a healthcare provider is advised.

In summary, adults typically need one to two doses depending on their health profile and prior vaccination history, with periodic doses possibly recommended every 1 to 5 years for certain groups, especially those over 65 or with high-risk conditions.