From the Overview: "On March 19, 2020, the State Public Health Officer and Director of the California Department of Public Health issued an order requiring most Californians to stay at home to disrupt the spread of COVID-19 [coronavirus disease 2019] among the population. The impact of COVID-19 on the health of Californians is not yet fully known. Reported illness ranges from very mild (some people have no symptoms) to severe illness that may result in death. Certain groups, including people aged 65 or older and those with serious underlying medical conditions, such as heart or lung disease or diabetes, are at higher risk of hospitalization and serious complications. Transmission is most likely when people are in close contact with an infected person, even if that person does not have any symptoms or has not yet developed symptoms."
State of California
California Coronavirus (COVID-19) Response: https://covid19.ca.gov/