Herd immunity is the name for a point in time when it's hard for a disease to spread through a group of people. The idea of herd immunity works for some diseases, such as measles. But it's a harder ...

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

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 initial epicenter within a Texas Mennonite community highlights how declining vaccination rates can lead to rapid disease transmission. While some may believe that abstaining from vaccination ...

Add Yahoo as a preferred source to see more of our stories on Google. There are now seven measles cases linked to schools in Broomfield. Measles outbreaks like this in Colorado have not happened in ...

You might have heard of herd or community immunity, when a vaccinated portion of a population (aka "the herd") provides unvaccinated people with some protection from a contagious disease. Thanks to ...