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Two coronaviruses SARS-CoV and SARS-CoV-2 appeared in China possibly from animal market in 2002 and 2019 respectively, bear resemblences in terms of structure, genome characteristics, incubation period, basic reproductive number, and symptoms However;the epidemic trajectory for both the viruses appears different While SARS was contained within eight months after causing 774 deaths across 26 countries;COVID-2019 caused 18,589 deaths across 197 countries within three months The future course of COVID-19 remains unclear There always remains a possibility that coronaviruses will surface from time to times in humans and cause outbreaks © 2020 Wutan Huatan Jisuan Jishu All rights reserved
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