Outbreak of avian influenza virus H5N1 in India

SIR, — The highly pathogenic avian influenza (hpai) virus subtype h5n1 has become endemic in poultry populations in south-east Asia since 2003. During the second week of July 2007, an unusual mortality of 82 per cent was reported in a flock of 132 chickens on a poultry farm in Manipur, northeast