Coloured transmission electron micrograph (TEM) of SARS-CoV-2 coronavirus particles isolated from a US case of the disease Covid-19. SARS-CoV-2 (previously 2019-nCoV) was first identified in Wuhan, China, in December 2019. It is an enveloped RNA (ribonucleic acid) virus. The coronaviruses take their name from their crown (corona) of surface proteins, which are used to attach and penetrate their host cells. Covid-19 is a respiratory infection that can lead to fatal pneumonia. As of the 10th March 2020, over 113,000 have been infected worldwide with over 4,000 deaths. Travel restrictions and quarantines have been put in place to slow the spread of the virus.

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達志影像

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