WHO set the vaccination goal for mid-2022, but health researchers say the mutating virus that spreads more easily means we need to set new priorities for global health.

About 63% of Americans have gotten at least one vaccine dose. The Biden administration wants to get to 70% by July 4.

Health professionals in Arkansas say there are a variety of reasons why people there are hesitant to get vaccinated.

For COVID-19, predictions of what it will take to reach herd immunity vary wildly, and it’s more complicated than one magic number.

Vaccination only works if most of the population has been inoculated.