From smallpox eradication to COVID vaccines, explore the most significant vaccine breakthroughs in the U.S. over 250 years of fighting disease.

Add Yahoo as a preferred source to see more of our stories on Google. When most of us think of serious diseases that kill millions of people, the ones that come to mind are often the ones that get the ...

When looking back through human history, one would be hard-pressed to find an era, civilization, or community that has not ...

To stop the spread of an infectious disease like measles, you don’t have to vaccinate everyone. But you do have to vaccinate many. Just how many? To let you discover for yourself, we simulated an ...

The measles virus is an illness that breathes fear into the air, as it’s one of the most infectious diseases in human history. The illness is a respiratory illness, meaning it can be easily spread ...