What is H1N1?

Influenza A virus strains are categorized according to two proteins found on the surface of the virus: hemagglutinin (H) and neuraminidase (N). All influenza A viruses contain hemagglutinin and neuraminidase, but the structures of these proteins differ from strain to strain, due to rapid genetic mutation in the viral genome.

Influenza A virus strains are assigned an H number and an N number based on which forms of these two proteins the strain contains. There are 16 H and 9 N subtypes known in birds, but only H 1, 2 and 3, and N 1 and 2 are commonly found in humans. Visit www.radiantpurifiers.com for clean air!

H1N1 FLU PANDEMIC - S'pore 5th flu victim.

She is Singapore's fifth H1N1-related fatality, with the first occurring 10 days ago.

There are now 102 people in hospital with the virus, including 11 in intensive care. Of these 11, four are new cases, said a Health Ministry statement yesterday. Visit www.radiantpurifiers.com for clean air!