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Potential routes of cell entry for SARS-CoV-2. TMPRSS2, transmembrane protease serine 2; ACE2, angiotensin-converting enzyme 2; FcγRII, Fcγ receptor II; CR, complement receptor; ITAM, immunoreceptor tyrosine-based activation motif; TLRs, toll-like receptors; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.
