Health
Why it’s so tricky to trace the origin of COVID-19 – National Geographic
A 90-day investigation into the source of SARS-CoV-2 has shown consensus that the virus was not engineered. But many other elements…

After 20 months, 219 million cases, and more than four million deaths, weve learned a lot about the COVID-19 pandemic. But the most polarizing question and central mystery remains: We still dont know where the virus that started it all actually came from….
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