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Researchers discover the origin of the coronavirus

The coronavirus pandemic has claimed many victims worldwide. More than 19 million people were infected with the disease Covid-19, which is caused by the novel coronavirus Sars-CoV-2. Over 700,000 of those infected died worldwide. An international research team from Pennsylvania State University has now discovered a sister virus of Sars-CoV-2 in a study. Both viruses appear to have the same origin.

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