COVID-19 is more difficult to diagnose in children and adolescents, finds study The ongoing pandemic of coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has spread to over 192 countries and territories, causing an enormous loss of lives and economic devastation. The clinical presentation of this disease varies hugely between individuals, causing asymptomatic or mild infection in most cases but leading to life-threatening disease in about 15% of infections. Only about 0.4% of cases have been diagnosed in children below 10 years of age. medRxiv* preprint server, deals with the clinical presentation, tests and complications in children and adolescents with COVID-19.