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'''Influenza''' or '''The Flu''' is an infliction caused by a [[virus]] that affects the [[nose]], [[throat]], and [[lungs]]. The Flu may cause severe illness and may be life-threatening in both [[infant]]s and old people.
==Symptoms==
* [[Fever]]
* [[Headache]]
* [[Fatigue]]
* a dry [[cough]]
* [[Sore throat]]
* a runny nose
* [[muscle]] aches
* [[nausea]]
* [[vomit]]
* [[diarrhea]]
==When Flu Occurs==
The peak of flu season can occur anywhere from late [[December]] through [[March]]. The overall health impact (e.g., infections, hospitalizations, and deaths) of a flu season varies from year to year. The Center for Disease Control monitors circulating flu viruses and their related disease activity and provides influenza reports each week from [[October]] through [[May]].
==Contagion==
The period when an infected person is contagious depends on the age and health of the person. Studies show that most healthy adults may be able to infect others from 2 days prior to becoming sick and for 10 days after they first develop symptoms. Some young children and people with weakened immune systems may be contagious for longer than a week. While each flu season is unique, it is estimated that, on average, approximately 5% to 20% of people get the flu each year, and more than 200,000 persons are hospitalized for flu-related complications each year. About 36,000 people die on average per year from the complications of flu.
==Symptoms==
* [[Fever]]
* [[Headache]]
* [[Fatigue]]
* a dry [[cough]]
* [[Sore throat]]
* a runny nose
* [[muscle]] aches
* [[nausea]]
* [[vomit]]
* [[diarrhea]]
==When Flu Occurs==
The peak of flu season can occur anywhere from late [[December]] through [[March]]. The overall health impact (e.g., infections, hospitalizations, and deaths) of a flu season varies from year to year. The Center for Disease Control monitors circulating flu viruses and their related disease activity and provides influenza reports each week from [[October]] through [[May]].
==Contagion==
The period when an infected person is contagious depends on the age and health of the person. Studies show that most healthy adults may be able to infect others from 2 days prior to becoming sick and for 10 days after they first develop symptoms. Some young children and people with weakened immune systems may be contagious for longer than a week. While each flu season is unique, it is estimated that, on average, approximately 5% to 20% of people get the flu each year, and more than 200,000 persons are hospitalized for flu-related complications each year. About 36,000 people die on average per year from the complications of flu.