DEAR DOCTOR K: I'm 70 years old. I already had a pneumonia vaccine, back when I was 65. At my checkup last week, my doctor said I need to get another one. Why?
DEAR READER: I always like to hear that adults are staying up to date with their vaccinations, as you did when you received a dose of the PPSV23 (Pneumovax) vaccine at age 65. Pneumovax helps protect against pneumonia caused by one common type of bacteria, called pneumococcus.