In TODAY.com's Expert Tip of the Day, a doctor reveals the important clues about your health that can be found in your snot.

IT’S that time of year when countless illnesses are flying around, from coughs and colds to Covid and flu. Most of the time, ...

Rhinoviruses and endemic coronaviruses are the main causes of the common cold. Recent studies show “common” cold viruses can cause severe and even fatal illness in healthy adults. Infection with ...

This symptom appears more frequently in cases of illnesses such as Covid or respiratory syncytial virus (RSV). An update from ...

Viral upper respiratory tract infections – also known as the common cold – afflict everyone, typically three times per year, ...

LOS ANGELES -- Every time kids go back to school, the whole family gets sick. CDC data reveals we haven't had this many cases of the common cold since we hit another high peak three years ago! As flu ...

Winter illnesses can have similar symptoms but there are warning signs of pneumonia that need to be treated in hospital ...

This symptom appears more frequently in cases of illnesses such as Covid or respiratory syncytial virus (RSV). An update from ...