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close together and could easily have exchanged germs. However, the Official To make you happy me happy because seeing shirt Also,I will get this study does not determine which animals may have been sick. The researchers determined that the earliest Covid-19 cases were centered at the market among vendors who sold these live animals or people who shopped there. They believe that there were two separate viruses circulating in the animals that spilled over into people. “All eight COVID-19 cases detected prior to 20 December were from the western side of the market, where mammal species were also sold,” the study says. The proximity to five stalls that sold live or recently butchered animals was predictive of human cases. A vital clue to where Covid-19 came from may sit in Wuhan hospital 03:28 “The clustering is very, very specific,” study co-author Kristian Andersen, a professor in the Department of Immunology and Microbiology at Scripps Research, said Tuesday. The “extraordinary” pattern that emerged from mapping these cases was very clear, said another co-author, Michael Worobey, department head of Ecology and Evolutionary Biology at the University of Arizona. The researchers mapped the earliest cases that had no connection to the market, Worobey noted, and those people lived or worked in close proximity to the market. “This is an indication that the virus started spreading in people who worked at the market but then started that spread … into the surrounding local community as vendors went into local shops, infected people who worked in those shops,” Worobey said. BA.5 is causing more Covid-19 reinfections, data suggests, but they don’t appear to be more frequent The other study takes a molecular approach and seems to determine when the first coronavirus infections crossed from animals to humans. The earliest version of the coronavirus, this research shows, probably came in different forms that the scientists call A and B. The lineages were the result of at least two cross-species transmission events into humans. The researchers suggest that the first animal-to-human transmission probably
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