Here are the signs of each. As new COVID-19 variants arise, symptoms may change and can vary depending on vaccination status, according to the CDC. Triple threat of illness: Why is everyone sick ...

With the holiday season in the U.S., there is often a rise in cases of colds, flu, and COVID-19. As people gather indoors and travel increases, the spread of respiratory illnesses becomes more common.

Flu activity remains "elevated" in the United States but is starting to show signs of abating ... Meanwhile, although COVID-19 activity is "elevated" in many areas of the U.S., CDC data shows ...