African swine fever is harmless to people but fatal and highly contagious for pigs, with no known cure. [File: Jeon Heon-Kyun/EPA]
Millions of pigs have been culled in China and Vietnam as a UN food agency urges Asian governments to make containing virulent African swine fever their top priority.
With an announcement by the UN Food and Agricultural Organization (FAO) that infections have spread to Laos, some experts are saying it is the largest animal disease outbreak in history.
The FAO said in a report late on Thursday that more than 3.7 million pigs in the region had been culled since the outbreak began in China last Augu
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