Illustration of antigenic drift in influenza virus

Description

This illustrates the genetic change by mutation that causes new seasonal flu strains each year. This is called “antigenic drift.”

Credit

Public domain/ National Institute of Allergy and Infectious Diseases/ Links Studio, Illustrator/ 2011

Source

http://www.niaid.nih.gov/topics/Flu/Research/basic/Pages/AntigenicDriftIllustration.aspx