Passengers walk in Jianghan Road Metro Station in Wuhan, central China's Hubei Province. (Photo: Xinhua)

China's CDC has completed a national epidemiological survey of COVID-19 serum and concluded that the coronavirus infection is at low level among Chinese population.

The survey was conducted among some 34,000 people over a month after China contained the 1st wave COVID-19 outbreak. It shows positive rate of coronavirus antibodies in Wuhan was 4.43%; but in Hubei outside Wuhan, it was 0.44%. Only 2 tested positive among 12,000 outside Hubei.