The World Health Organization's team, which is to find out how the corona virus has spread around the world, has now been working in China for less than a week.

Today, Wednesday, the team visited the lab in Wuhan that has been at the center of speculation about the virus' origin.

There, they talked to the employees about "important issues" for three hours, but did not leave any information about what was said, reports the news agency AP.

It could take several years before the world finds out the exact origin of the virus and how it spread, experts say.

The work of collecting samples and conducting analyzes and interviews will take time.

The group, which consists of researchers from ten countries in areas such as veterinary medicine, virology, food safety and epidemiology, has since Thursday visited hospitals, research institutes and the market that could be linked to many of the first cases. 

One of the group's members, Peter Ben Embarek, a specialist in food safety, says that the visit to the market was rewarding.

"Too early to draw conclusions"

- All stores are there, the equipment is there.

It gives you a good idea of ​​maintenance, infrastructure, hygiene and the flow of goods and people, he tells AP but adds that it is too early to draw any conclusions yet. 

The lab that was visited today was built after the SARS outbreaks almost 20 years ago, to study some of the world's most dangerous infectious agents.

When the coronavirus began to spread, it was speculated that it may have come from that particular lab.

At present, however, there is no indication that the virus spread from there.

"May be too late"

Peter Daszak, a zoologist and also part of the WHO team, says that he has worked with the lab and is sure that it follows all protocols.

But he also adds that the WHO's investigation may have come too late to find some important clues in Wuhan.

- We could have been here a year ago and done a good job, he says and continues:

- We dig to get more and more information about each possible distribution route.