Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), the provisional name of 2019 novel coronavirus (2019-nCoV), is the etiology of respiratory disease of coronavirus disease 2019 (COVID-19) [1]. Human-tohuman transmission of the virus has been confirmed. Soon after COVID-19 was designated as a Public Health Emergency of International Concern by the WHO on January 30th 2020, it spreads worldwide rapidly. On March 11th 2020 the WHO declared it a pandemic and now it has spread all over the world involving more than 200 countries and regions. The numbers of new cases and death toll rise exponentially. As to date of April 2nd 2020, the number of infected people with SARS-CoV-2 has exceeded 1,000,000 worldwide. Among them the proportions of health care professional are very high. State Health Departments in Ohio and Minnesota reported that up to 20 percent of those infected are healthcare professionals, a number in line with Italy and other hard-hit regions of the world [2]. Physicians in caring of COVID-19 patients may recognize many of the names in ICU are colleagues, leadership at the hospital, and trusted specialists. The presumable death toll has been estimated to be more than 100,000 in the USA alone.

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