Scientists from China said they've identified two strains of COVID-19 linked to the recent outbreak.
Coronaviruses are a large family of RNA viruses, and when RNA viruses replicate quickly, they often mutate.
Researchers analyzed 103 sequenced genomes using strains from China, and found that 70% of strains were one type, which they called "L." The "L" strain was more aggressive than the remaining 30% of strains, which were dubbed "S."
A man wearing a face mask uses an escalator in the financial district of Lujiazui in Shanghai, March 4, 2020.A man wearing a face mask uses an escalator in the financial district of Lujiazui in Shanghai, March 4, 2020.
The new paper, published Tue
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