In the paper, why New Coronavirus Disease-19 (COVID-19) should belong to a class of protein nanoparticle and possessed ultra-small size and super-penetration capability, as well as effect of the COVID-19 characteristic on follows phenomena were discussed. (1) The difference existed on toxicity, transmission speed and diffusion range of the COVID-19 and Severe acute respiratory syndrome (Sars) virus. (2) The different time interval between COVID-19 infection and discover existed in different person. (3) The different time interval in "new crown virus infection", "asymptomatic infection", "suspected case" and "re-infection" produced existed in different person. (4) The different time interval from COVID-19 infection to produce SARS‑CoV‑2 disease existed in different person. The improve methods and suggestion for avoiding and preventing COVID-19 infection and treating SARS‑CoV‑2 were proposed.
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Published on: Mar 31, 2021 Pages: 38-42
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DOI: 10.17352/2455-3492.000043
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