A substitute teacher at Centaurus High School and a staffer at the Denver Federal Center have been notified about possible exposure to the coronavirus.

The teacher, who has been working at Centaurus, in Lafayette, for the past five days, finished a cruise vacation Feb. 21, said Carolyn Nohe, communications manager with the Boulder Valley School District.

The substitute teacher was notified Wednesday that there were COVID-19 cases on the cruise, and the teacher in turn notified Centaurus principal Daniel Ryan of the situation.

“The staffer has shown no symptoms,” Nohe said.

As a precautionary measure, the teacher will not be at school through the end of the week, bringing to an end what would be considered a 14-day quarantine.

The school on Wednesday notified students’ families and Centaurus workers about the situation.

“Out of an abundance of caution, we want to notify you of a situation with a substitute staff member, who has been working at Centaurus for the past 5 school days,” Ryan said in the notification. “We learned today that this individual has been notified by a cruise line that there was a small cluster of COVID-19 cases on a cruise they took in the middle of February.”

The school district has increased cleansing and disinfectant work at the high school, and other schools, as part of coronavirus concerns and precautions.

“While we do not believe there is a significant risk of our students getting sick, we are dedicated to doing everything possible to protect our students and to keep you informed,” Ryan said. “BVSD has been updating resources about coronavirus and staying healthy here.”

The staffer at the federal center, which is in Lakewood, works for the Office of Natural Resources Revenue. Like the substitute teacher, the government employee has shown no symptoms and was notified about possible exposure Wednesday.

“An ONRR employee was notified that they may have been exposed during a trip, which ended 12 days ago. The employee has no confirmed exposure, no confirmed symptoms and no confirmed infection,” said Dr. Kate Sawyer, chief medical officer for the Interior Department’s Office of Occupational Safety & Health, in a written statement. “As a medical professional, I believe the risk to the employee is low and the risk to the office is extremely low, if not unlikely.”

Denver ONRR employees, as a precautionary measure, were given the option to “telework” for the remainder of the week, and the employee who was notified “is currently self-quarantined” as part of a precaution, according to a statement emailed to ONRR Denver workers by managers.

Federal departments and staffers will continue to work with the Centers for Disease Control and Prevention and emergency managers in taking precautions against any possible exposures, Sawyer’s statement said.

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