During the initial outbreak in Wuhan, China, various names were used for the virus; some names used by different sources included "the coronavirus" or "Wuhan coronavirus". In January 2020, the World Health Organizationrecommended

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Human-to-human transmission of SARS‑CoV‑2 was confirmed on 20 January 2020 during the COVID-19 pandemic. Transmission was initially assumed to occur primarily via respiratory dropletsfrom coughs and sneezes within a range of about 1.8 metres (6 ft).

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The first known infections from SARS‑CoV‑2 were discovered in Wuhan, China. The original source of viral transmission to humans remains unclear, as does whether the virus became pathogenic before or after the spillover event.

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SARS‑CoV‑2 belongs to the broad family of viruses known as coronaviruses. It is a positive-sense single-stranded RNA(+ssRNA) virus, with a single linear RNA segment. Coronaviruses

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Structure
Each SARS-CoV-2 virion is 60–140 nanometres(2.4×10 –5.5×10 in) in diameter; its mass within the global human populace has been

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Very few drugs are known to effectively inhibit SARS‑CoV‑2. Masitinib is a clinically safe drug and was recently found to inhibit its main protease, 3CLpro and showed >200-fold reduction in viral titers in the lungs and nose in mice. However, it is not approved for the

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Retrospective tests collected within the Chinese surveillance system revealed no clear indication of substantial unrecognized circulation

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