The two most common — and most severe — flu strains are A and B, the CDC says. Type A is known to cause more severe illness. Both viruses spread the same way and both are more likely to cause ...

There are two players every flu season: influenza Type A and Type B. Influenza A tends to pop up early in the season and accounts for more than 75 percent of all cases, while influenza B typically ...

Influenza, commonly known as the flu, is a contagious respiratory illness caused by the influenza virus. According to the Centers for Disease Control and Prevention (CDC), there are four types of ...

The flu is a common illness, but it can be serious. By understanding the symptoms, getting vaccinated, and following simple ...

Two types of influenza viruses are responsible for seasonal flu outbreaks: Influenza A and B. Influenza A accounts for around 75 percent of all cases and tends to cause more severe illness in adults.

While we often refer to it as "the flu," the influenza virus has several strains. Here's what to know about the two most ...