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Bird Flu Vax Spurs Virus Evolution
Inadequate poultry immunization programs may cause higher mutations rates in the bird flu virus, rendering the vaccine ineffective and increasing the threat of cross-species transmission.
By Edyta Zielinska | October 21, 2011
The H5N1 Type A influenza, commonly known as bird flu, is mutating faster in countries that have been implementing wide-scale, but incomplete, vaccinations of poultry, according to a report published online in Vaccine(October 12). The genetic changes accrued by the viruses rendered the vaccinations ineffective, and increased the risk that the virus could jump to humans.
That spotty vaccination campaigns seem ?to favor viral mutation, has been suspected for a long time, but this is the first study which is providing hard evidence for it,? Marisa Peyre, a researcher with the French Agricultural Research Center for International Development who was not involved in the research, said in an email.
More...
http://the-scientist.com/2011/10/21/bird-flu-vax-spurs-virus-evolution/
Inadequate poultry immunization programs may cause higher mutations rates in the bird flu virus, rendering the vaccine ineffective and increasing the threat of cross-species transmission.
By Edyta Zielinska | October 21, 2011
The H5N1 Type A influenza, commonly known as bird flu, is mutating faster in countries that have been implementing wide-scale, but incomplete, vaccinations of poultry, according to a report published online in Vaccine(October 12). The genetic changes accrued by the viruses rendered the vaccinations ineffective, and increased the risk that the virus could jump to humans.
That spotty vaccination campaigns seem ?to favor viral mutation, has been suspected for a long time, but this is the first study which is providing hard evidence for it,? Marisa Peyre, a researcher with the French Agricultural Research Center for International Development who was not involved in the research, said in an email.
More...
http://the-scientist.com/2011/10/21/bird-flu-vax-spurs-virus-evolution/