After mystery coronavirus case in California, health officials go into detective mode
By Elizabeth Chuck
C.D.C. Confirms First Possible Community Transmission of Coronavirus in U.S. (Published 2020)
By Roni Caryn Rabin
The CDC has changed its criteria for testing patients for coronavirus after the first case of unknown origin was confirmed
By Christina Maxouris, Holly Yan & Sarah Moon
California coronavirus case could be first spread within U.S. community, CDC says
By Jaclyn Cosgrove & Soumya Karlamangla
Coronavirus in California: The Latest Updates
By Marie Tae Mcdermott