A/H5N1 flu virus structural changes, very strong virulence
On 5-2, before two consecutive cases and deaths from avian influenza A/H5N1 within 1 month, Prof. Dr. Nguyen Tran Hien, Director of the Institute of Hygiene and Epidemiology, said the This strain of influenza A/H5N1 flu is virulent strains are strong, with high mortality.
This dangerous virus also changes in genetic structure, but not yet strong enough to be spread from person to person or alter the virulence of the virus. The cases may even cause a major outbreak, but it is worried that A/H5N1 flu virus remains in the water-bird colonies in some places, the same as a healthy carrier and supervision by the veterinary authorities shows that about 3% -5% of men duck H5N1 influenza viruses to spread risk is also higher.
Research Institute of Hygiene and Epidemiology also shows the proportion of poultry farmers healthy but have antibodies to avian influenza virus is about 0.4%.
http://www.sggp.org.vn/ytesuckhoe/2012/2/280315/
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