HYBRID MEDICAL ANIMATION / SCIENCE PHOTO LIBRARY HYBRID MEDICAL ANIMATION / SCIENCE PHOTO LIBRARY
Influenza (flu) virus entering a cell, artwork. Embedded in the virus particle's lipid envelope (green) are two types of protein spike, haemagglutinin (H) and neuraminidase (N). These are used to recognise and bind to a host cell and also determine the strain of virus. Once in the host cell the virus hijacks the cell's machinery making it produce new copies of the virus.
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