Avian Influenza Disease Emergency: issue No. 19 (28/07/2004)
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Avian influenza devastated poultry farms throughout Asia earlier this year, and has been notified again during the month of July in several countries including Thailand, Viet Nam, China and Indonesia. The reasons for the re-emergence of the disease at this period of the year is still unexplained but field epidemiological investigations carried out since the beginning of the crisis should eventually assist in better understanding the origin of the disease and its main features. Vaccination, which is already in use and encouraged in countries such as China and Indonesia could be applied in other affected countries if the disease becomes established. The possibility of using vaccination as a tool to curb the spread of the disease is currently being studied by national authorities of Thailand and Viet Nam.