H1N1 influenza: US research indicates limited pre-existing immunity in pigs

June 2009
Veterinary Record: Journal of the British Veterinary Association;6/13/2009, Vol. 164 Issue 24, p734
Academic Journal
The article reports on the result of a research conducted by the Agricultural Research Service (ARS) on the effect of the new H1N1 influenza virus in pigs in the U.S. It was found out that the pre-existing immunity of the pigs will not protect them from the effect of the new virus and that the vaccines being used will not take effect on it. A standard haemagglutination test was conducted and reveals that only two of the five vaccines tested have induced haemagglutination titre against the virus.


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