The virus responsible for infectious mononucleosis (commonly known as mono) affects about 90 percent of the population worldwide, and most commonly strikes teenagers and young adults ages 15 to 30. Knowing what symptoms to look for can help catch the virus—and put you on the path to recovery—sooner.

6 Signs Your Cold Is More Serious Than You Think
The common cold is a viral infection of your nose and throat (upper respiratory tract). It’s usually harmless, although it might not feel that way. Many types of viruses can