Symptoms of coronavirus (COVID-19) Find out about the symptoms of COVID-19 and what to do if you or your child has them. COVID-19 symptoms in adults COVID-19 symptoms in children What to do if you get symptoms again Related information. How to look after yourself at home if you have COVID-19 or symptoms of COVID-19. What Is COVID-19? COVID-19 is a new strain of coronavirus that has not been previously identified in humans. The COVID-19 is the cause of an outbreak of respiratory illness first detected in Wuhan, Hubei province, China. Since December 2019, cases have been identified in a growing number of countries. The District's surveillance data can be. COVID-19 is a respiratory condition caused by a coronavirus. Some people are infected but don’t notice any symptoms (doctors call that being asymptomatic). Most people will have mild symptoms.