COVID-19 infections and hospitalizations in the U.S. are on the rise as the highly contagious delta variant spreads, driven by the least vaccinated parts of the country. And while no vaccine is ...

The latest data from the Centers for Disease Control and Prevention (CDC) shows that more than 99.99% of those fully vaccinated against COVID-19 in the U.S. have not had a breakthrough case resulting ...

As measles spreads across the U.S., a few fully vaccinated people have contracted rare breakthrough cases. Here's what to know and why vaccination is still important.

With fall, and by extension, respiratory illness season, underway, COVID-19 cases have continued to fluctuate nationwide. Some regions of the United States are experiencing "very high" and "high" ...