Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the seventh pathogenic human coronavirus to be identified and the third with a predilection for causing potentially fatal pneumonia, after severe acute respiratory syndrome coronavirus and Middle East respiratory syndrome coronavirus. Coronavirus disease (COVID-19) infection is highly transmissible but has a relatively low death rate (1·0–3·5%), except in older people (aged >70 years) with comorbidities.1,2 It is estimated that 15–20% of people infected develop severe pneumonia and 5–10% require critical care.
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