In Santa Clara County, a woman and the family she is staying with are being quarantined and she is now in isolation at their home, Santa Clara County health officials told a news conference.
The other two cases involve a married couple in San Benito County, the San Benito County Public Health Services announced in a release late Sunday.
The Santa Clara woman, who recently traveled to the epicenter of the outbreak in Wuhan,
China, is the second case in Santa Clara reported, health officials said.