Flu season

Flu season is a period of time characterized by the prevalence of outbreaks of Influenza. The season occurs during the cold half of the year in each hemisphere. Influenza activity can sometimes be predicted and even tracked, but the timing and duration of flu seasons vary. They can occur from early fall to late spring.

Overview

Influenza is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccine each year.

Flu Season in the Northern Hemisphere

In the Northern Hemisphere, the flu season typically occurs in the winter, with peak activity between December and February. However, cases can start appearing as early as October and can last as late as May.

Flu Season in the Southern Hemisphere

In the Southern Hemisphere, the flu season typically occurs between April and September, the colder months of the year.

Flu Season in the Tropics

In the tropics, influenza activity occurs throughout the year.

Prevention

Flu vaccination is the best way to prevent the flu. The Centers for Disease Control and Prevention (CDC) recommends annual flu vaccination for everyone 6 months of age and older.

Treatment

Antiviral drugs are a second line of defense to treat the flu (including seasonal flu and variant flu viruses) if you get sick.

See Also

• Influenza
• Flu vaccine
• Centers for Disease Control and Prevention (CDC)

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  Influenza and pneumonia deaths
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  Pediatric influenza deaths
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  Influenza outpatient visits