After multiple cases of pneumonia of unknown etiology were reported in Wuhan, China, in December of 2019, a novel coronavirus was identified in January 2020 and officially named coronavirus disease 19 (COVID-19) by the World Health Organization (WHO) on February 11. Coronavirus infections in human mostly cause mild respiratory tract infections; however, different strains of coronaviruses were also responsible for severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) [1–3].