The cold and flu are respiratory illnesses caused by different viruses. Some cold and flu symptoms may overlap, but there are ...

With flu, “you might wake up in the morning with a full-on fever, nausea, chills, and muscle ache,” says Davis. (Coughing up phlegm? That’s a symptom of both a cold and the flu—and it’s ...

Phenylephrine is a medication that’s been used to relieve nasal congestion caused by colds, allergies, and hay fever, per the ...

It seems that some are just more prone to illnesses than others, but why? Is there anything that accounts for the difference, ...