disease

Pigs roam at a dumping area in Calcutta, Eastern India, 31 July 2014. The Calcutta Municipal Corporation and Calcutta Police undertook a joint raid to remove pigs from localities. As the death toll due to Japanese Encephalitis Syndrome increased to 123 in north Bengal. Japanese Encephalitis Syndrome is caused by a mosquito-borne virus. While humans are the dead-end hosts of the virus, pigs act as amplifying hosts that aid in spreading of the disease.

Piyal Adhikary/EPA

Pigs roam at a dumping area in Kolkata, India. The municipal corporation and the police undertook a joint raid to remove the pigs

A market inspector checks ducks at a wholesale poultry market in Ha Vy village, outside Hanoi

A market inspector checks ducks at a wholesale poultry market in Ha Vy village, outside Hanoi. Reuters/Kham

Chinese authorities slaughtered over 20,000 birds at a poultry market in Shanghai on Friday as the death toll from a new strain of bird flu mounted to six, spreading concern overseas and sparking a sell-off in airline shares in Europe and Hong Kong. Vietnam banned imports of Chinese poultry.