The frequency of getting the pneumonia vaccine depends on age, health status, and specific risk factors. For infants, the PCV13 vaccine is given in a series at 2, 4, 6, and 12–15 months of age. Adults generally need only one dose of the PCV13 vaccine. Additionally, a single dose of the PPSV23 vaccine is recommended for adults over 65 years or those with certain health conditions such as chronic heart disease, asthma, or immunocompromising conditions. Some people may need both vaccines, but these should be given in separate visits to ensure effectiveness. People under 65 with risk factors like smoking or chemotherapy may need the PPSV23 vaccine as well.

In summary:

• Infants: Series of PCV13 doses (2, 4, 6, and 12-15 months)
• Adults 65 and older: One dose PPSV23 (sometimes plus PCV13)
• Adults under 65 with risk factors: PPSV23, possibly PCV13
• Both vaccines given separately if needed

Regular revaccination depends on specific circumstances and health guidance, usually not annually but based on medical advice and risk profile.