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. 2020 Aug 5:1–10. doi: 10.1080/07391102.2020.1803139

Figure 1.

Figure 1.

The seven confirmed coronavirus to infect the human being. Note that SARS-CoV-2 has been preceded by six known human coronaviruses HCoV-229E, HCoV-OC43, SARS-CoV, HCoV-NL63, HCoV-HKU-1 and MERS-CoV. Note also that these viruses are mainly targeting the respiratory system and causing health problems ranging from symptoms of mild upper respiratory tract (such as HCoV-229E, HCoV-OC43, HCoV-NL63 and HCoV-HKU-1) to severe respiratory syndrome that can even lead to death (such as SARS-CoV, MERS-CoV and SARS-CoV-2).