New domestic cases in first half of May mostly from cluster infections: Official

A total of 39 new domestic COVID-19 cases were confirmed in China during first half of May, marking a 46 percent decrease compared to the second half of April, said Mi Feng, a spokesperson for the National Health Commission said at a regular briefing on Saturday.

However, most of theose cases came from clusters of infections, said Mi, adding that asymptomatic COVID-19 cases showed up in many areas.

The health official also urged strengthening patient treatment and epidemiological investigation and improving nucleic acid testing capabilities so as to better prevent the spread of the epidemic.