Many counties in Tennessee, Florida, and South Carolina had more people moving in than out domestically.

Across the US, county vaccination rates range from 0.1% to nearly 100%. The interactive map below shows the most and least vaccinated counties in each state. Hover over a county to see its ...

A second measles-related death was reported out of New Mexico this week. Here's where measles cases have been reported in the U.S. this year.