COVID-19 infections in the Chinese city of Wuhan, where the virus was first reported, may have been nearly 10 times higher than that reported. Despite the high number of COVID-19 cases, the immunity required to protect against another wave is still missing, said the serological survey conducted by the Chinese Centre for Disease Control and Prevention.
Of over 34,000 surveyed, only about 4.4 percent were found to have specific antibodies that can fight off the virus that causes COVID-19, as per the data released on December 27.
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That ratio suggests that Wuhan, which houses about 11 million people, may have reported many as 5,00,000 cases of COVID-19, nearly 10 times more than the 50,000 confirmed cases reported by health authorities in mid-April, when the survey was conducted.
The China CDC survey also showed that the impact of COVID-19 was far less outside Wuhan, which was effectively isolated to contain the spread of the outbreak.
Of the 12,000 surveyed in six other Chinese cities and provinces, including Beijing, Shanghai and Guangdong, only two people tested positive for the antibodies suggesting an extremely low prevalence of the virus across the rest of the country.
Read: China kicks off emergency COVID-19 vaccination in Wuhan
Several countries have criticised China for its initial handling of the outbreak, which has now spread around the world in a global pandemic in the year since the cases first emerged.
The United States and President Donald Trump has been one of the most vocal critics. As per several accounts, the cases and deaths reported by China were allegedly lower than the actual tally.
The coronavirus has killed at least 1.76 million people since the outbreak emerged in China in December 2019, according to an AFP tally on Monday based on official sources. At least 80 million cases have been registered.
The United States is the worst-affected country with 333,140 deaths, followed by Brazil with 191,139, India with 147,901 and Mexico with 122,426.
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