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.

For every county in the United States, the map below shows information on all the animals and plants protected under the U.S. Endangered Species Act as threatened or endangered. To see the number of ...

A fast-growing measles outbreak in West Texas has nearly doubled in just one week, now totaling 90 cases across seven counties and spreading to New Mexico. Earlier this week, the Texas Department of ...