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(a) Key SARS CoV-2 proteins implicated in COVID-19. The viral genome encodes 29 proteins among which at least 13 have been implicated in its virulence. (b) Coronavirus structure, cell entry, and replication. ACE2 = angiotensin-converting enzyme 2; ERGIC = endoplasmic reticulum–Golgi intermediate compartment; ER = endoplasmic reticulum.
