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The novel coronavirus that arose in Wuhan in December 2019 is a new strain of coronavirus [1]. Most coronaviruses cause only mild respiratory illness such as the common cold, but the new virus, named SARS-CoV-2 by the WHO, can cause severe disease, pneumonia, severe acute respiratory syndrome (ARDS), kidney failure, and death [2-5]. Since there is no specific treatment, the goal now is to protect the susceptible population [1-4]. After the first cases were reported in early December in Wuhan [6, 7], the epidemic spread rapidly, but enforced lockdowns and other measures slowed the spread of the disease beyond Wuhan. By May, the number of new cases were as few as 25 per week. Except for Wuhan, most cities in China returned to work gradually, but throughout the rest of the world, the COVID-19 outbreak continued.

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