"The two in California had no known travel histories to China or anywhere else that would have exposed them to the virus, Dr. Sara Cody, the county's chief medical officer, told The New York Times. They are presumed to have caught the virus through community spread, she told the Times."
Wednesday, April 22, 2020
Community spread earlier than previously presumed.
Post mortem testing on Californians who died in early February moves back the start date for community spread:
