Epidemiological and clinical characteristics of COVID-19 in adolescents and young adults

•Adolescents and young adults are more involved in frequent social activity, overseas studying, and international working or tourism which make them to be susceptible to the worldwide spread of Coronavirus Disease 2019 (COVID-19).•Adolescent and younger patients with COVID-19 had a median incubation period of 8 days, and 50% of their family contacts developed illness within 1.4 days after exposure.•Three asymptomatic patients with COVID-19 infected their family contacts.•Few adolescent and young adult patients showed severe clinical signs and symptoms such as bacterial pneumonia changes by Chest CT findings, fever, and shortness of breath.•Most adolescent and young adult patients had better prognosis outcomes after treatment.