Dr. Stephanie Widmer joins GMA to talk the infectious diseases hitting hard this season and how to stay healthy.

RSV and the flu have taken hold as Chicago residents have partaken in festivities in the last several weeks, and COVID is also increasing.

The Centers for Disease Control and Prevention has previously signaled that influenza A, COVID and RSV are on the rise across the U.S. Now, the risk of catching norovirus — more commonly known as the stomach flu — is escalating,

Here's what you need to know about norovirus, or the stomach flu. According to the CDC, "norovirus is a very contagious virus" that causes acute gastroenteritis, an inflammation of the stomach or intestines and leads to vomiting and diarrhea.

Norovirus, aka the stomach flu, is surging across the United States as 2025 begins. Here's what to know about norovirus symptoms, how it spreads, and prevention.