INFECTIOUS DISEASES Vaccines

Vaccines are the most effective way to prevent a host of infectious diseases and their complications. Vaccines benefit those who receive them and those who don't respond to, or can't receive, vaccines due to age or underlying health conditions. When most people are immunized against a disease, community spread is significantly interrupted. Many once-common diseases have been virtually wiped out due to vaccines, including polio, chickenpox, measles, diphtheria, and rubella. Smallpox was completely eradicated through widespread vaccination. Our infectious diseases experts are actively engaged in discovery and development of new vaccines to prevent emerging infections around the world, and in ensuring equitable access to them.

In the News

Infectious Disease Researchers

Clinical Trials

Learn more about clinical trials underway at Johns Hopkins.