Since Wuhan, China’s largest Covid-19 epidemic has been driven by the Delta strain

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After the Delta version of the coronavirus slipped through China’s defenses in late 2019, the nation is currently dealing with its largest coronavirus outbreak. Cases were reported in 14 of the country’s 32 provinces.
While the overall number of illnesses – more than 300 so far – is considerably fewer than in other outbreaks, the vast distribution implies that the variety has been on the loose for some time, which is frightening those in charge of the world’s most stringent containment procedures.
Since the virus was first discovered in the central Chinese city of Wuhan in December 2019, it has posed the greatest threat to the world’s second-largest economy. More than 30 previous flare-ups were squashed by China’s stringent rules, including mass testing, intensive contact tracing, quarantines, and sometimes lockdowns.
The emergence of the more contagious Delta form, on the other hand, is putting that strategy to the test. Because most of the country has been Covid-free for months, the new strain may be taking advantage of the population’s current readiness to relax their defenses when it comes to masking and distancing.
This, along with increased travel during the summer months, gave the ideal conditions for Delta to establish itself. In mid-July, the initial illness arrived in Nanjing, China, on an international aircraft from Moscow and quickly spread among the airport cleaning workers.
On Monday (Aug 2), China reported 99 illnesses, including 44 people who tested positive but had no symptoms. It is the largest epidemic in terms of infections since a flare-up in Hebei, northern China, in January, when 2,000 individuals were sick.

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