American President Joe Biden has ordered intelligence and security agencies to investigate the origins of the virus and to report back in 90 days.
In a public statement, Biden asked the agencies to double their efforts to determine the origins of Covid-19.
The first case of the virus was reported in the last months of 2019 in the city of Wuhan, China.
The health authorities, including WHO, have acted on the thesis that the virus was transmitted from animals to human beings at the wet markets in the same city.
Last February, a group of international experts which went to China to investigate the origins of Covid-19 completely dismissed the theory that the Coronavirus came from a laboratory, despite the fact they said that they are still a long way from identifying the source of the virus.
However, new reports are doubting this hypothesis and are linking a lab in. China with the virus which to date has left 3.5 millions victims around the world.