A number of revisions of the case and deaths data added to suspicions China was massaging the numbers. Serological surveillance has been widely used by health professionals around the world to gauge the true scale of epidemics, from Covid-19 to AIDS and hepatitis. The China CDC survey showed a far less impact of the virus outside Wuhan, which was effectively shut off as a way of containing the outbreak. The results for Wuhan mean even China’s worst-hit city is still vulnerable to Covid-19. Since quelling the Hubei outbreak, China has largely contained the coronavirus, with sporadic flareups since April snuffed out through aggressive contract tracing and quickly testing millions of people in a matter of days.

Source: Mint December 29, 2020 06:22 UTC