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Agarose gel electrophoresis. lanes 1 to 6: amplicons of E gene of SARS‐CoV‐2 were digested with AluI; lanes 8 to 13: amplicons of RdRp gene of SARS‐CoV‐2 were digested with Tsp45I; lane 7: DNA ladder 100 bp. SARS‐CoV, severe acute respiratory syndrome coronavirus
