The Swine Flu Virus from 1930-1998

1 subtype (H1N1) had sickened North American pigs

The Swine Flu Virus in 1998

H3N2 jumped species barrier from human to pig

The Swine Flu Virus in 2003

H4N6 spread from ducks to pigs, can bind to human cells

What might be fostering the evolution of the new Swine Flu Virus

Changes on the farm may be forstering; by increased herd size and or vaccination the norm (may select for new viral types)

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RNA Virus(sect.2-4)

Influenza Virus:The Swine Flu

Question	Answer
The Swine Flu Virus from 1930-1998	1 subtype (H1N1) had sickened North American pigs
The Swine Flu Virus in 1998	H3N2 jumped species barrier from human to pig
The Swine Flu Virus in 1999	Spread across country
The Swine Flu Virus in 2003	H4N6 spread from ducks to pigs, can bind to human cells
What might be fostering the evolution of the new Swine Flu Virus	Changes on the farm may be forstering; by increased herd size and or vaccination the norm (may select for new viral types)