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https://www.sciencemag.org/news/2020...reak-s-origins
Mining coronavirus genomes for clues to the outbreak’s origins By Jon CohenJan. 31, 2020 , 6:20 PM SNIP The viral sequences, most researchers say, also knock down the idea the pathogen came from a virology institute in Wuhan. SNIP PHYLOGENETIC TREE IMAGE That’s one reason why many scientists suspect there’s an “intermediary” host species—or several—between bats and 2019-nCoV. According to Bedford’s analysis, the bat coronavirus sequence that Shi Zheng-Li’s team highlighted, dubbed RaTG13, differs from 2019-nCoV by nearly 1100 nucleotides. On nextstrain.org, a site he co-founded, Bedford has created coronavirus family trees (example below) that include bat, civet, SARS, and 2019-nCoV sequences. (The trees are interactive—by dragging a computer mouse over them, it’s easy to see the differences and similarities between the sequences.) SNIP Strong evidence suggests the marketplace played an early role in spreading 2019-nCoV, but whether it was the origin of the outbreak remains uncertain. SNIP Conspiracy theories also abound. A CBC News report about the Canadian government deporting Chinese scientists who worked in a Winnipeg lab that studies dangerous pathogens was distorted on social media to suggest that they were spies who had smuggled out coronaviruses. The Wuhan Institute of Virology, which is the premier lab in China that studies bat and human coronaviruses, has also come under fire. “Experts debunk fringe theory linking China’s coronavirus to weapons research,” read a headline on a story in The Washington Post that focused on the facility. SNIP disease ecologist Peter Daszak of the EcoHealth Alliance, dismissed Ebright’s conjecture. “Every time there’s an emerging disease, a new virus, the same story comes out: This is a spillover or the release of an agent or a bioengineered virus,” Daszak says. “It’s just a shame. It seems humans can’t resist controversy and these myths, yet it’s staring us right in the face. There’s this incredible diversity of viruses in wildlife and we’ve just scratched the surface. Within that diversity, there will be some that can infect people and within that group will be some that cause illness.” Daszak and Shi’s group have for 8 years been trapping bats in caves around China to sample their feces and blood for viruses. He says they have sampled more than 10,000 bats and 2000 other species. They have found some 500 novel coronaviruses, about 50 of which fall relatively close to the SARS virus on the family tree |
I just want to know if I need to start stocking up on gasoline to burn my neighbors bodies, so if someone would let me know when we get to that point, it would be much appreciated.
Thanks! |
Wuhan seafood market may not be source of novel virus spreading globally
By Jon CohenJan. 26, 2020 , 11:25 PM https://www.sciencemag.org/news/2020...et_cid=3187839 SNIP Lucey says if the new data are accurate, the first human infections must have occurred in November 2019—if not earlier—because there is an incubation time between infection and symptoms surfacing. If so, the virus possibly spread silently between people in Wuhan—and perhaps elsewhere—before the cluster of cases from the city’s now-infamous Huanan Seafood Wholesale Market was discovered in late December. “The virus came into that marketplace before it came out of that marketplace,” Lucey asserts. SNIP |
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