And why does it feel so much worse than a cold?
This season, medics have been struck by the predominance of a different strain of flu that can be particularly damaging to children—influenza B.
Flu season is already here, but that's no reason to skip this year's vaccine. It not only protects against the flu but also lessens the severity of the illness.
The vaccine is the "first and most important step in protecting against influenza and its potentially serious complications," according to the CDC.
The study provides more proof that children should be vaccinated against the virus, experts stressed.
Scientists have so far struggled to find ways of killing the bacteria which cause measles and the flu in the air before they enter our bodies.
There are simple, straightforward steps you can take to protect yourself and those around you.
Ten passengers who were admitted to a local hospital were diagnosed with influenza and will continue to be monitored.
Scientists believe men create more of a protein called amphiregulin which helps with healing.
Although the flu is common, sometimes it can be life-changing.
Her family has no idea how she contracted the incredibly rare disease.
Flu season may be winding down but it isn't over.
The teen's parents were told to let a viral infection "run its course."
Here's what's happening inside your body as the flu invades.
The strain to which you lost your flu virginity will always hold a special status.
Several factors could make the athletes more susceptible to the virus.
Younger "baby boomers" are being particularly hard-hit by the flu this year.
School districts have rushed to clean every "Lego and Potato Head" as absences this flu season reach abnormal levels.
Emily was given Tamiflu to relieve her symptoms.