4 coronavirus variants can make people sicker or spread faster, including the variant first found in India. Here's why experts are so concerned about mutant strains.

4 coronavirus variants can make people sicker or spread faster, including the variant first found in India. Here's why experts are so concerned about mutant strains.

Business Insider

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COVID-19 "variants of concern" include the coronavirus variant first found in India, which is more infectious than the original strain.

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