Why did African swine fever spread so fast in China?

Systemic problems in China may have accelerated the spread of African swine fever, a dangerous pig virus that has no cure or vaccine. According to an investigative piece by Chinese business portal Caixin last month, divergent interests of central and local officials, money worries and "political tasks" created incentives to hide disease reports. Lacking reliable information, farmers panicked and liquidated herds when they heard rumors of disease in their neighborhood. Big regional price differences due to localized pig liquidations and quarantines created strong incentives to truck pigs and pathogens around the country. Traders flouting bans easily evaded authorities--and were often abetted by corrupt veterinary officials who sold fraudulent health certificates and ear tags. China's first cases of African swine fever (ASF) were reported in August 2018. Within 8 months the virus had spread to all 31 provincial regions, including the remote Himalayan region of Tibet and ...