Adults need immunizations to protect them against vaccine-preventable diseases too. Shots can protect adults against respiratory infections like whooping cough and influenza. Adults may not have been vaccinated as a child against Hepatitis A–an infection spread by contaminated food and water. This vaccine is recommended for adults who travel internationally. Typhoid is another travel vaccination for some locations. If you are traveling, you should call your physician in advance about how to protect yourself.
Here is more information about adult_vaccinations.
If you are traveling, go to the CDC’s travel site.