COVID-19 continues to spread in the United States and around the world. Here's what you need to know.

There's a new variant of COVID-19, and it's sparking concern among health officials and the public around the world.

The protection one of the authorized COVID-19 vaccines provides may decrease after six months, according to a new study.

Health officials are investigating a Salmonella outbreak that appears to be linked to salad greens.

As viruses replicate, they start to change. That's exactly what has happened with COVID-19, which has led to several variants of the original virus.

A new medication to treat COVID-19 has earned emergency approval from the US Food and Drug Administration (FDA).

Hundreds of people across the United States have become sick with Salmonella after contact with backyard poultry.

COVID-19 might have arrived in the United States earlier than we realized.

Wondering how effective your Moderna or Pfizer COVID-19 vaccine really is? The Centers for Disease Control and Prevention (CDC) has an answer.

The Centers for Disease Control and Prevention (CDC) has announced a Salmonella outbreak that may be tied to frozen stuffed chicken products.