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@CharlesRixey @BillyBostickson However, circulating strains of HCoV-OC43 with the same Furin cleavage site have been identified as early as 1996. https://t.co/o7ExAoj6Ec
@CharlesRixey @BillyBostickson However, circulating strains of HCoV-OC43 with the same Furin cleavage site have been identified as early as 1996. https://t.co/o7ExAoj6Ec