Adults who have never received childhood vaccinations can have serious complications from diseases such as the flu, pertussis, or pneumonia. And for adults who did receive all the recommended vaccines as children, immunity against some diseases can gradually fade away over the years, meaning that booster shots are needed.
The Centers for Disease Control and Prevention recommends that adults (19 to 65+ years) receive the following vaccines:
Pneumococcal (pneumonia) vaccine
This vaccine protects against serious infections caused by bacteria called Streptococcus pneumoniae. Anyone can get pneumococcal disease, but certain people are at risk for complications. You should get the pneumonia vaccine if you are 65 or older. If you are younger than 65, you should get this shot if you have a chronic illness, such as diabetes, heart or lung diseases, sickle cell disease, alcoholism, or cirrhosis. Other people who should get this shot are people with a weakened immune system, such as those with kidney failure, a damaged spleen or no spleen, HIV/AIDS, certain types of cancer, or those who smoke.