Number of asymptomatic patients drop 22 percent in 10 days on Chinese mainland

The number of asymptomatic patients who're under medical observation on the Chinese mainland has dropped 22 percent in around 10 days while daily increase of the kind is below 10 people in average, said Song Shuli, a spokesman of the National Health Commission (NHC) at a press briefing on Thursday.

According to the latest NHC report, there're 712 asymptomatic patients still under medical observation as of Wednesday.

Asymptomatic patients refer to those who tested positive for the disease but show no clinical symptoms. They will be classified as confirmed COVID-19 patients once they develop clinic symptoms or their CT scans show indications of COVID-19. 

Song also noted increase of number of close contacts to domestic cluster, saying China will step up testing and screening to resolutely prevent rebound of the disease. 

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