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A second case of coronavirus has been confirmed in Santa Clara County, county health officials announced Sunday afternoon, in an adult woman who recently traveled to Wuhan, China.

The case is not related to the first confirmed local case, announced on Friday, which involved a local man who returned on Jan. 24 from Wuhan, the part of China where the disease originated, according to a news release Sunday from the Santa Clara County Public Health Department.

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The Centers for Disease Control (CDC) informed county officials of the case Sunday morning.

“The two cases we’ve confirmed in our county to date are both travel associated … and both of them were essentially remaining in one residence since they came,” said county Health Officer Dr. Sara Cody at a press conference Sunday afternoon. “That’s why I don’t think these two cases change the risk to the general public.”

The woman, who is not a Santa Clara County resident, came to the area on Jan. 23 to visit family. She has stayed at home since arriving, except for two occasions where she sought outpatient medical care, and “has been regularly monitored and was never sick enough to be hospitalized,” according to the news release.

The woman’s family members have also been isolated and have not left their home, according to the county, while the Public Health Department has provided food and other necessary items.

The county said it will not release more information about the woman because the investigation is in its early stages.

The county has been expecting and preparing for local cases of coronavirus because of the large number of travelers to the Bay Area, including many people traveling from China, Cody said.

“We anticipate we may find additional cases,” said Cody, adding that health officials expect new cases to taper off as travel from outside the country also falls with recent travel restrictions by the U.S., which were implemented Sunday, on air travel from China.

“It would not be surprising when we do have a new case due to close, household contact,” said Cody. “What would be significant is if we had a case without a history of travel, to an area where we know the virus is circulating without a known close contact.”

The first local case involved a man who never became sick enough to require hospitalization and had contact with few people, according to county officials, but sought outpatient treatment twice. The county is also monitoring that man’s family members and others with whom he came in contact.

The respiratory illness, caused by a novel coronavirus, has been identified by health officials to have originated in Wuhan, the capital of China’s Hubei province. Most of the 14,550 confirmed cases of the infection worldwide are in China, where 304 people have died from the virus, according to the Associated Press.

This weekend, officials in the Philippines confirmed the death in that nation of a 44-year-old man from Wuhan, the first death from the illness outside of China. The man’s 38-year-old female companion, also from Wuhan, has also tested positive for the virus and was hospitalized in isolation in Manila.

The new confirmed case in Santa Clara County is the fourth in California and the ninth in the United States.

Symptoms of coronavirus are similar to the flu, and include fever, coughing, and shortness of breath, according to the California Public Health Department. Some patients have experienced mild respiratory illness while others have had more severe cases.

People who experience those symptoms and have traveled to China, or had close contact with someone who has traveled to China in the last 14 days, should call ahead before seeking care at a doctor’s office or emergency room.

The best way to prevent the spread of any virus is to wash your hands, cover your mouth with a tissue, sleeve or arm when coughing or sneezing, and avoid contact with others, especially large gatherings, if you have respiratory symptoms.

Check back for updates.