For the first time in China where the coronavirus first emerged in December, numbers of asymptomatic cases are dwindling.
According to the country’s National Health Commission, all of Tuesday’s 36 new cases involved arrivals from overseas, down from 48 a day earlier and taking total infections to 81,554.
But that figure excludes 130 new sufferers of the highly contagious disease who do not show symptoms, its statistics showed.
China has decided to devote greater screening to asymptomatic sufferers and those in contact with them.
The identification of asymptomatic carriers comes from screening and tests of suspected cases and tens of thousands of people with whom they have had contact.
As of Tuesday, there were about 20,000 people under observation, the commission said, though they may not necessarily be carriers.
A total of more than 700,000 people who had been in close contact with suspected cases had been traced so far in China, it said.
Citing classified data, the South China Morning Post said China had found more than 43,000 cases of asymptomatic infection through contact tracing.
Asymptomatic infections would not cause a major outbreak if the transmission chain was cut, the Chinese government’s senior medical adviser, Zhong Nanshan, told state-run Shenzhen TV.
He said that once asymptomatic infected people were found they would be isolated and their contacts isolated and kept under observation.
Users of Chinese social media have expressed fear that carriers with no symptoms could be spreading the virus unknowingly, especially as authorities ease curbs on travel for previous hotspots now that infections have subsided.
Recall that World Health Organisation’s epidemiologist, Maria van Kerkhove, had in March, said symptomatic patients were the main drivers of transmission, while most of those classified as asymptomatic developed symptoms a few days after diagnosis.
By Tuesday, 1,367 asymptomatic cases were under observation in China, down from 1,541 the previous day, the health commission said.
Seven deaths from the virus were reported on Tuesday, up from just one the day before, all but one were in the central province of Hubei, where the outbreak began.
Although the tally of imported cases, at 806, is just a small fraction of overall cases, authorities fearing a second wave of infection have barred entry to most foreigners and ordered tougher checks on citizens returning from abroad.
U.S. Secretary of State Mike Pompeo said the Group of Seven economies last week discussed an intentional disinformation campaign by China on the coronavirus, adding that the world still needed accurate information from Beijing.
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