The Covid-19 virus may have been around for a decade. That’s the conclusion of a team of scientists, who identified a coronavirus closely related to the SARS-CoV-2 virus, which causes Covid-19, in samples of two bats found in Cambodia more than a decade ago.
According to Revista Planeta, the discovery, described in the journal Nature Communications, and the recent detection of the closest ancestors of SARS-CoV-2 known to date in bats living in caves in Laos indicate that viruses related to SARS- CoV-2 have a much broader geographic distribution than previously reported.
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The findings confirm the hypothesis that the pandemic originated through the spillover of a bat-borne virus.
According to the publication, scientists used metagenomic sequencing to identify nearly identical viruses in two shamel horseshoe bats (Rhinolophus shameli) originally sampled in 2010.
Thus, the authors consider, the current understanding of the geographic distribution of the SARS-CoV and SARS-CoV-2 lineages possibly reflects a lack of sampling in Southeast Asia, or at least the Greater Mekong sub-region, which encompasses Myanmar, Laos , Thailand, Cambodia and Vietnam, as well as Yunnan and Guanxi provinces in China.
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