Flu ( Influenza )

What is the flu?

The flu is an infection that is caused by viruses. The medical term for the flu is "influenza."

There are different type of flu, the most common type of flu is the "seasonal" flu. Besides seasonal flu, there is also the "swine" flu and the bird flu. Bird flu ("avian flu") is a severe form of the flu that is caused by a type of flu virus that first infected birds.

What are the flu symptoms?

Symptoms of flu can come on very suddenly.

Common symptoms of flu:

Fever (temperature higher than 100ºF or 37.8ºC)

Extreme tiredness

Headache or body aches


Sore throat

Runny nose

Serious symptoms of flu in adults:

Difficulty in breathing or shortness of breath

Chest pain or heaviness of chest or belly



Severe Vomiting


Most people with the flu get better on th