Bronchitis is one of the most common illnesses in the world, so chances are, you’ve had it at some point. And if you have, you know what a pain its symptoms can be—persistent coughing, heavy ...

Coughing, sore throat, fatigue, fever, and a stuffy or runny nose are all hallmark signs of a cold or other respiratory virus. But sometimes that cough persists for days (or even weeks) after the ...