(Washington Reuters) A senior American official said yesterday that the United States hopes that the World Health Organization (WHO) will conduct further research on the traceability survey of crown disease, which may include visiting China again.

Marc Cassayre, the US delegation in Geneva, said that he hoped that the WHO delegation would contact the original data and personnel required to complete independent evaluation from January to February this year.

It is expected to be announced this week's long report

Earlier, the WHO said that a team composed of international experts and its Chinese peers is expected to announce a long report this week. Casere said at a press conference: "We hope that this report is based on scientific research on science researchIt is the real progress to understand the traceability of viruses worldwide, so that we can be fully prepared for the future epidemic. "

Casere also saysConfirm the source of the virus."According to us, this is likely to require further research by the team, including going to China or conducting further discussions."

The investigation of

WHO was previously affected by delay, entry issues, and factors in the Sino -US disputes.

Some members of the traceability team have also accused China of being unwilling to share key data. These data may show that the virus has been spread a few months before confirmation at the end of 2019.

WHO Expert Group leader An Barrequer, at the press conference at the end of the investigation, excluded the possibility of Wuhan's laboratory leakage and said that the virus may come from bats, but it is not sure how to spread to humans.