"2019 new coronavirus was discovered due to emerging viral pneumonia cases in Wuhan; and the infectious disease was named ""COVID-19"" by the World Health Organization (WHO). It is the seventh coronavirus capable of infecting humans, which was named “SARS-CoV-2” by the Interna tional Committee on Taxonomy of Viruses (ICTV) (the others are HCoV-OC43, HCoV-HKU1, HCoV-NL63, HCoV-229E, SARS-CoV, MERS-CoV). The virus is about 100 nanometers in diameter."
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