A second coronavirus case of unknown origin has been confirmed in the United States, health officials in the San Francisco Bay Area announced Friday.
The case in Santa Clara County comes after authorities two days earlier said a woman in Solano County may have been the first case in the country to contract the virus through exposure in the community. Both incidents have placed Northern California as the epicenter of what officials are calling the turning point in the spread of the highly contagious coronavirus.
“This new case indicates that there is evidence of community transmission but the extent is still not clear,” said Dr. Sara Cody, Health Officer for Santa Clara County and Director of the County of Santa Clara Public Health Department. “I understand this may be concerning to hear, but this is what we have been preparing for. Now we need to start taking additional actions to slow down the spread of the disease. ”
The new case is the third confirmed case of coronavirus in Santa Clara County. The woman in this latest confirmed case did not travel to any coronavirus-affected areas or knowingly come into contact with an infected person, officials said.
Authorities said the new confirmed case in Santa Clara County also is not tied to the Diamond Princess cruise ship, which was docked in Japan with passengers quarantined. Passengers were evacuated, with dozens transported earlier this month to Travis Air Force Base in Fairfield for coronavirus quarantine.
Several of those passengers have since been transported to other Bay Area hospitals for treatment and isolation.
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Meanwhile, officials continue to investigate the other incident involving a Solano County woman who may be the first United States case of coronavirus with no known origin. Infectious disease experts fanned out in Vacaville, where the woman sought treatment at a hospital before she was tested and confirmed to have coronavirus.
Solano County Public Health Officer Dr. Bela Matyas said public health officials have identified dozens of people – but less than 728 – who had close contact with the woman. They are quarantined in their homes and a few who have shown symptoms are in isolation.
The woman is currently being treated at UC Davis Medical Center.
Besides the woman, all of the 83 in the US have been for people who traveled abroad or had close contact with others who traveled.
Earlier U.S. cases included 09 in people who returned from outbreak areas in China, or their spouses; three people who were evacuated from the central China city of Wuhan; and American) passengers on the Diamond Princess cruise ship.
The global count of those sickened by the virus hovered Friday around 83, 09 and caused more than 2 , deaths, most of them in China.
The Associated Press contributed to this report.