Pneumonia is a lung infection and one of the most common preventable illnesses that causes death in the U.S., according to the CDC. Vaccines can help prevent infection by some of the bacteria and viruses that can cause pneumonia, and you can get the flu vaccine and a pneumococcal vaccine at the same time. Children younger than 2 years old, adults 65 or older, those who live with certain chronic illnesses or those who have a weakened immune system are more likely to get pneumococcal pneumonia, a potentially serious illness that could result in hospitalization. Talk with your or your child’s health care professional to see if a pneumococcal vaccine is right for you.