He said there was insufficient evidence to conclude “whether it came from human contact with an infected animal or from a laboratory accident.”
Biden said in a statement Wednesday (AST) that the majority of the intelligence community does not believe there is enough information to assess the possibility of more than one.
He called on China to cooperate with US national laboratories in international research into the origin of the epidemic.
“The United States is also working with like-minded partners around the world to press China to participate in fully transparent, evidence-based international research and access to all relevant data and evidence,” he said.
Mr Biden said the Chinese government had refused to fully co-operate in international investigations, adding that firm conclusions would never be known.
“Failure to get our inspectors on the ground in those early months will always hamper any investigation into the origin of COVID-19,” he added.