EC Gastroenterology and Digestive System

2019 was characterized by the appearance of a new COVID-19 virus infection [30]. Human coronaviruses were first isolated by D. Tyrrell and M. Bynoe in 1965 with seasonal infection [25]. But, at the beginning of the XXI century, we were faced with its different variants: severe acute respiratory syndrome (SARS), which first appeared in November 2002 in the Chinese province of Guangdong [15]. At that time, 8098 cases with a mortality rate of 9.6% were registered [21]. The next was Middle East Respiratory Syndrome (MERS, MERS-CoV). The first cases of which were registered in the eastern part of Saudi Arabia in September 2012. As of December 2019, 2,484 cases were confirmed, of which 857 (34.5%) were fatal [10].

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