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Inhibition of viral spike protein binding with cellular receptors. Bromhexine hydrochloride and arbidol hydrochloride inhibit docking of ACE‐2 with S1 subunit hence inhibits viral phagocytosis (cellular internalization). Camostat inhibits TMPRSS2 cellular receptor, which is needed for priming of S protein and facilitation of docking between S1 and ACE‐2
