WHO calls for more research on asymptomatic transmission of Covid-19

Saying that the world has been achieving a lot in knowing the new virus, the WHO chief told reporters that "there's still a lot we don't know"

The World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus said that more research needs to be done to better understand the extent to which Covid-19 is being spread by people who don't show symptoms.

"Since early February, we have said that asymptomatic people can transmit Covid-19, but that we need more research to establish the extent of asymptomatic transmission," the WHO chief said at a virtual press conference from Geneva on Wednesday, Xinhua news agency reported.

"That research is ongoing, and we're seeing more and more research being done," he added.

Saying that the world has been achieving a lot