From the Background and Situation: "Novel coronavirus disease, or COVID-19, is a new respiratory disease that spreads from person to person. Most people who get the infection have mild symptoms or no symptoms at all. Some develop severe illness requiring hospitalization, especially people who are older and/or have chronic medical conditions like heart disease, lung disease, diabetes, kidney disease and weakened immune systems. The elderly and those with chronic conditions are often recipients of home care services. The most common signs and symptoms of COVID-19 infection include acute (newly developed) fever, cough, difficulty breathing, fatigue, muscle aches, sore throat, and headache. Acute nausea, vomiting, or diarrhea are less commonly reported symptoms of COVID-19 infection. At present, there is no vaccine to prevent COVID-19 and no treatment after someone has been exposed to COVID-19."
San Francisco Department of Public Health
San Francisco Disease Prevention and Control: https://www.sfcdcp.org/