Figures at a glance

Figure 1

Figure 2

Figure 3

FIGURE 1

Figure 1: Structure of SARS-CoV-2

FIGURE 2

Figure 2: Animal origins of human corona viruses (SARS-CoV, MERS-CoV and SARS-CoV-2)

FIGURE 3

Figure 3: (A) Spike proteins on the surface of the corona virus bind to angiotensin-converting enzyme 2 (ACE-2) receptors on the surface of the target cell; (B) the TMPRSS2 binds to and cleaves the ACE-2 receptor. In the process, the spike protein is activated; (C) Cleaved ACE-2 and activated spike protein facilitate viral entry