In China, restrictions were eased as cases declined, but by mid May, new clusters were reported, including in the city of Wuhan where the virus first emerged.In one instance, eight Chinese citizens returning from Russia tested positive, prompting the quarantining of some 300 others who had travelled in the same time frame.Hong Kong established systems, such as electronic bracelets for those arriving from overseas, to track people’s movements and ensure quarantines were adhered to.By early February, South Korea had swiftly developed a system to conduct about 10,000 free tests daily, while relying on apps and GPS technology to track down cases – giving it the framework to quickly squash any new outbreaks.It allowed them to “put in place local alert systems, so even if the general situation is under control but a new focus emerges, that particular location can lock down,” adds Dr Rohn. A cluster of new infections – first recorded on 12 May, after weeks with nearly no new domestic cases – was quickly traced and linked to specific locations in Seoul’s popular nightclub district. The outbreak in the Chinese city of Shulan close to the Russian border was traced to a laundry worker who infected 13 others initially, but officials still haven’t worked out how she got it.China’s CDC has said it might have to conduct further epidemiological and biological investigations to see if her virus was a version of what was circulating in Russia.
Read more at: https://www.bbc.com/news/world-asia-52807255
