2 years of COVID-19: Origins, variants, and the future - Medical News Today

What have we learned about the evolution of viral variants after 2 years of COVID-19? We asked experts about the lessons learned and the questions still pending.

Before March 2020, many people saw pandemics as a thing of the past. Then came COVID-19. Scientists still do not know exactly where the virus that caused it SARS-CoV-2 came from, but it soon reached … [+11536 chars]

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