This afternoon, WHO gave emergency use listing to Sinopharm Beijing's Covid-19 vaccine, making it the sixth vaccine to receive WHO validation for safety, efficacy and quality.
Tedros clashed repeatedly with former US president Donald Trump, who began withdrawing his country from the WHO before President Joe Biden immediately rescinded the move upon taking office in January.
President Joe Biden said Tuesday he had not made a decision on whether to support a vaccine waiver, but that the United States was moving "as quickly as we can" to export doses.
The WHO chief voiced concern that the international expert team had "expressed the difficulties they encountered in accessing raw data" while in China.
"WHO has received the full mission report over the weekend on the origins of the SARS-CoV-2 virus from the team that visited Wuhan earlier this year," Tedros confirmed.
The Geneva-based body urged vigilance as case numbers rise in several regions, including Europe, driven partly by virus variants that transmit more easily.
"It is very clear that Russia is up to its old tricks, and in doing so is potentially putting people at risk by spreading disinformation about vaccines that we know to be saving lives every day," a State Department spokesman said.
The interim distribution list issued on February 3 broke down the programme's initial 337.2 million doses -- of which all barring 1.2 million Pfizer-BioNTech doses, are from AstraZeneca. Both WHO-approved vaccines require two injected doses.