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).