WUHAN, China—The virus that leads to Covid-19 most possible jumped from a person species to another just before getting into the human population and is really not likely to have leaked from a laboratory, a chief of a Globe Overall health Corporation investigative group said at a news meeting in the Chinese metropolis of Wuhan.

In laying out the alternatives for the origin of the pandemic, the WHO group said Tuesday it was also probable that the virus might have been transmitted to humans by way of imported frozen food, a concept seriously promoted by Beijing. But the group said the most possible state of affairs was a person in which the virus spilled in excess of in a natural way from an animal into humans, such as from a bat to a tiny mammal that then infected a particular person.

“Did we adjust significantly the image we experienced beforehand? I never assume so,” said Peter Ben Embarek, a Danish food-safety expert who spoke on behalf of the WHO delegation. “Did we boost our being familiar with? Did we increase details to that image? Certainly.”

The preliminary assessment arrived during a news meeting at the stop of a four-7 days mission, which integrated two months of quarantine, to Wuhan, the primary centre of the pandemic. It arrives additional than a 12 months just after the virus initial began spreading in China and about the globe, killing additional than two million people today.

Immediately after reviewing environmental samples from Wuhan’s Huanan Marketplace, as effectively as countless numbers of organic samples and circumstance documents from additional than 200 local hospitals, 17 Chinese and 17 WHO industry experts said the industry was a person put wherever the virus began spreading speedily, but cautioned that it was impossible to say how the virus arrived there.