H1N1

Definition	:	Hemagglutinin Type 1 and Neuraminidase Type 1
Category	:	Medical » Viruses & Bacteria
Country/Region	:	Worldwide
Popularity	:

What does H1N1 mean?

‘Influenza’ A (H1N1) virus is a subtype of influenza A virus and was the most common cause of human influenza (flu) in humans. Influenza viruses can be identified based on the chemical structure of specific proteins found on the outer surface coat of the virus particle. The two dominant proteins found on the virus surface are known as Hemagglutinin (often referred to as “H” or “HA”) and Neuraminidase (“N” or “NA”). There are many forms of H and versions of N.