An experimental treatment protects mice from COVID-19, flu, bacteria, and more.

Vaccines have traditionally worked by teaching the immune system to recognize a specific virus or bacterium—in effect, ...

How do vaccines work? Here's what medical experts want you to know about safety and efficacy.

COVID-19 vaccines lower the risk of getting sick, seriously ill or dying from the disease. But how do the different types of COVID-19 vaccines work? Each COVID-19 vaccine causes the immune system to ...

European regulators advanced several new medicines, including a combined flu and COVID vaccine and new treatments for rare diseases.

DEAR DR. ROACH: My daughter was recently visiting and tested positive for COVID. Since my last COVID vaccine was eight months ago, I searched for how much protection I still had and understood the ...

NPR's Juana Summers talks with infectious disease expert Dr. Peter Chin-Hong about the new rules regarding access to COVID-19 vaccines. UNIDENTIFIED REPORTER #1: New rules are now causing some ...

With measles outbreaks, flu spikes, and COVID as a seasonal threat, learn key differences between these contagious diseases, ...

New Jersey residents are facing obstacles in getting the latest COVID-19 vaccine due to new federal guidelines. The U.S. Health and Human Services Department now recommends the vaccine only for ...