According to WHO the median time from onset to clinical recovery for mild cases is approximately 2 weeks and is 3-6 weeks for patients with severe or critical disease. [1][https://www.who.int/docs/default-source/coronaviruse/who-china-joint-mission-on-covid-19-final-report
According to Johns Hopkins Medicine those with a mild case of COVID-19 usually recover within one to two weeks. For severe cases, recovery can take six weeks or more, and there may be lasting damage to the heart, kidneys, lungs and brain. About 1% of infected people worldwide will die from the disease. [2]https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/diagnosed-with-covid-19-what-to-expect