Health officials in western Texas are trying to contain a measles outbreak among mostly school-aged children, with at least 15 confirmed cases. It's the latest outbreak of a disease that had been ...

As new viruses like COVID-19, bird flu, norovirus, and RSV (respiratory syncytial virus) continue to spread, vaccines have ...

Here is what we know about polio as a disease, its vaccines and the likely number of lives saved through inoculation.