Flu: Pandemics

Written by WebMD Editorial Contributors
Medically Reviewed by Zilpah Sheikh, MD on July 08, 2026

There has been evidence of bird flu infection in humans since 1997. The following article is available on the CDC website. 

Related Website: Advanced Reading: Avian Flu in Humans

 

In this article, you’ll read more about virus genetics and how pandemics occur. The following link takes you to the CDC website.

Related Website: About Pandemic Influenza

 

Learn how viruses mutate and what that means for flu shots. Learn more from this article on the CDC website.

Related Website: Advanced Reading: Different Types of Flu Vaccines

 

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