Your immune system may be weak if you have frequent, severe, or extended infections. Learn more signs of a weak immune system.

Experts highlight the importance of the Td vaccine in combating waning immunity against tetanus and diphtheria in adults.

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

You have probably heard that the United States is close to losing its measles elimination status, due to increasing numbers of measles cases since 2025.

Vaccine efficacy against infection wanes, but does everyone need a 2nd booster? This is a MedPage Today story. As the U.S. experiences a dip in COVID-19 cases and mask mandates are being lifted, some ...