Flu season is here in California, but other illnesses are in full swing in the Golden State. Here are the symptoms and how long you're contagious.

Norovirus cases have surged, joining other viruses like flu, RSV, and Covid. Experts cite a new strain, GII.17[P17], ...

Podcaster Sam Harris says the events that led to his fallout with Elon Musk included a bet over the number of U.S. COVID-19 ...

Experts call the health implications “dire” with some fearing Kennedy could set off a fresh round in the school culture wars ...

Historically, COVID-19 symptoms have been fevers or chills, cough, shortness of breath, cough, congestion or a runny nose, sore throat, loss of taste or smell, fatigue and body aches, headache, nausea ...

Care for the flu is generally supportive — meaning rest, hydration, and over-the-counter medication, but as the Mayo Clinic ...

Most Americans have developed some level of protection against severe disease from previous COVID-19 infections, vaccinations ...

Twenty states (plus D.C.) had "very high" levels of the virus present in wastewater, an increase from 16 states the week before.

COVID-19, influenza, RSV, and norovirus—have created what experts are calling a "quad-demic" in the U.S. Here's what to know ...

Rates of norovirus in that CDC system have reached levels at or above last season's peak in all regions of the country.

— The flu, caused by influenza viruses that are always changing, leads to fever, chills, cough, sore throat, runny nose, body ...