Avian flu or bird flu is a contagious disease normally limited to birds and, less commonly, pigs. However, the virus can spread to humans by direct contact with infected poultry or with contaminated surfaces. In the 2004–05 outbreak in Vietnam of the highly contagious H5N1 strain of the disease, there were around sixty confirmed cases involving humans, of which some forty were fatal, according to the World Health Organization. The vast majority of people infected had direct contact with diseased birds. Since the initial outbreak, a further sixty or so cases have been reported, the most recent in April 2010.
Evidence of human-to-human transmission has yet to be confirmed but the indications are that, if it is possible, it is extremely rare and has so far been limited to close family members. The main fear among health experts is that the virus will mutate into a form that is highly infectious to and easily spread among humans.
At present the risk to travellers visiting infected areas remains low. As a precaution, however, you are advised to avoid contact with live poultry and pigs, including live animal markets, and to eat only well-cooked poultry and eggs. Check the latest with your doctor or travel health specialist prior to travel. You’ll also find up-to-date information on the following websites: w avianinfluenza.org.vn, w
who.int/csr/disease/avian_influenza/en and w cdc.gov/flu/avian.