2. COVID-19 challenges
COVID-19 is a contagious fatal respiratory disease caused by a novel
virus called severe acute respiratory syndrome coronavirus-2
(SARS-CoV-2). It was first recognized at the end of 2019 in Wuhan, China
until being now an ongoing pandemic (Huang et al., 2020). As of 30 June
2020, more than 10.3 million cases have been reported across 188
countries and territories, resulting in more than 507,000 deaths and
more than 5.28 million people have recovered (CSSE, 2020).