While the report, obtained by Associated Press, concludes it is highly likely the virus was originally transmitted from bats to humans through another animal, there is little advancement from the experts' previous stance in the immediate aftermath of the trip which concluded in February.
However, the research center didn't report any disruptions or incidents that would have been caused by the move, and it wasn't storing or testing coronaviruses or bat viruses ahead of the outbreak, the report said. Virus could have come from farms, not marketsThe WHO report addressed the possibility that the virus was introduced to humans through the food chain.
The head of the United Nations health agency said the report would be published on Tuesday and that it was ultimately inconclusive about the origin of the new coronavirus.
"It is clear that that the Chinese government has not provided all the data needed and, until they do, firmer conclusions will be hard", he said in a statement.
The virus could have been in circulation in November to October in 2019 in Wuhan, where the outbreak started.
The early cases had been tied to the seafood market but the report could not definitively conclude whether it was the true origin of the virus. Top Biden administration officials on Sunday expressed concern about the way the WHO-China report was crafted, including the possibility that the Chinese government had a hand in writing it.
China has faced claims that the Wuhan Institute of Virology could be the suspected source of the Covid-19 virus. U.S. Secretary of State Antony Blinken told CNN this week he had concerns about the report's methodology, "including the fact that the government in Beijing apparently helped to write it".
The mission was never meant to identify the exact natural source of the virus, an endeavour that typically takes years.
An worldwide team of experts travelled to Wuhan in January to probe the origins of the virus. "And we have pointed to many additional studies that should be conducted from now on".
According to Johns Hopkins University, the United States (USA) is home to 28,652,953 cases of COVID-19 infections, followed by Brazil and India.
WHO Director-General Tedros Adhanom Ghebreyesus acknowledged he had received the report over the weekend and said it would be formally presented on Tuesday.
In a statement to member states after the report was released, Ghebreyesus said: "Let me say clearly that as far as World Health Organization is concerned, all hypotheses remain on the table".
The two likeliest supported the consensus around the theory that the SARS-CoV-2 virus evolved in bats and began infecting humans either directly or through an intermediary species.
In a statement delivered to member states during a briefing on the WHO's long-awaited report into the origins of the pandemic, Dr Tedros Adhanom Ghebreyesus, director general of the World Health Organization, issued a rare rebuke to China.
Direct transmission from the original host animal is deemed "possible to likely", while the cold food chain hypothesis, which pins the blame on frozen food or its packing, is called "possible".
Twelve months later, there have been more than 127 million cases of COVID-19 around the world, with 2.8 million people dying from the disease.
Sales records showed 10 stalls at the Huanan market in late December sold animals or products from snakes, poultry, Sika deer, badgers, rabbits, bamboo rats, porcupines, hedgehogs, salamanders, giant salamanders, and crocodiles.