Smriti Mallapaty
Nature, Feb. 14, 2023
“The researchers concluded that the virus was probably shed by humans, but Rasmussen and others are keen to take a closer look at the raw data, which included swabs from a defeathering machine, to see whether they can identify animal species.”
The World Health Organization (WHO) has quietly shelved the second phase of its much-anticipated scientific investigation into the origins of the COVID-19 pandemic, citing ongoing challenges over attempts to conduct crucial studies in China, Nature has learned.
Researchers say they are disappointed that the investigation isn’t going ahead, because understanding how the coronavirus SARS-CoV-2 first infected people is important for preventing future outbreaks. But without access to China, there is little that the WHO can do to advance the studies, says Angela Rasmussen, a virologist at the University of Saskatchewan in Saskatoon, Canada. “Their hands are really tied.”
In January 2021, an international team of experts convened by the WHO travelled to Wuhan, China, where the virus that causes COVID-19 was first detected. Together with Chinese researchers, the team reviewed evidence on when and how the virus might have emerged, as part of phase one. The team released a report in March that year outlining four possible scenarios, the most likely being that SARS-CoV-2 spread from bats to people, possibly through an intermediate species. Phase one was designed to lay the groundwork for a second phase of in-depth studies to pin down exactly what happened in China and elsewhere. …SOURCE
