An infectious disease specialist took the time to explain what herd immunity is, how it works and when it might affect the spread of COVID-19. Dr. Frank Esper works for the Cleveland Clinic Children's ...

Vaccines boost the immune system's ability to fight off diseases. Vaccines undergo rigorous testing to ensure safety and effectiveness. Widespread vaccination contributes to herd immunity, protecting ...

Herd immunity occurs when enough people become immune to a disease, either through vaccination or previous infection. This can reduce the likelihood of it spreading and increase protection for ...

Back in the early 1900s, about one in five children died before entering kindergarten. The most common reason: infectious disease. Today, just one in 27 dies so young, most often because of an ...

There are different kinds of vaccines, and each requires different processes to move from the laboratory to your physician's ...

Vaccines work, actually. But that’s not all. Depending on the specific vaccine we’re talking about, that jab might also prevent cancer, heal herpes lesions, help you keep most of your marbles, prevent ...

Vaccinations used to seem simple. Your doctor would tell you which to get, and you’d roll up your sleeve at the office or a nearby pharmacy. Now we’re seeing changing recommendations, and some people ...

Plenty of people – about 1 in 3, according to some studies — feel bad for a day or two after they get a flu shot. The most common symptoms include headaches, muscle aches, fatigue and fever, all of ...