Riverside County officials late Saturday reported the first case of locally acquired coronavirus, with the unidentified person under treatment at Eisenhower Health in Rancho Mirage.

The patient, who is not being identified because of confidentiality rules, had tested positive for COVID-19, health officials said.

“Public Health is following up on people who may have been exposed and an investigation is in progress to determine how the individual contracted COVID-19,” said a statement from Riverside University Health System – Public Health.

“We are trained and prepared to respond to these situations. We have been in communication with hospitals and healthcare providers in Riverside County and have provided them with the information and resources they need. Protecting the health of Riverside County remains our top priority,” said Kim Saruwatari, public health director.

The first case of confirmed coronavirus involving a Riverside County patient was a passenger on the Diamond Princess cruise ship who was expected to fully recover. The resident was at a Northern California medical facility, officials said Feb. 25.

More recently, officials announced Friday that Murrieta Valley High School would be closed Monday as an employee is being tested for coronavirus while 71 students were told to “self-quarantine.”

Please note RivCo 2-1-1 information call line staff can answer basic questions about #coronavirus and other matters. For medical advice, however, contact your health care provider. For specific coronavirus-related questions, call https://t.co/pBDUyWo0YM. #RivCoNow @RivCoReady — Dr. Cameron Kaiser (@RivCoDoc) March 7, 2020

Riverside County’s announcement came as the 14th case in Los Angeles County was announced Saturday.

As of Saturday morning, there were 88 confirmed cases and one death in California from coronavirus, according to the California Department of Public Health.

Nationwide, the death toll from the virus climbed Saturday to 16, with all but three victims in Washington state. The number of infections swelled to nearly 400, scattered across about half of the U.S. states.

Worldwide, the virus has infected more than 100,000 people and killed over 3,400, the vast majority of them in China. Most cases have been mild, and more than half of those infected have recovered.

The Associated Press contributed to this story.