NEWARK, N.J., Oct. 24 (UPI) -- A health care worker who treated Ebola patients in West Africa was put in quarantine at a New Jersey hospital after developing a fever.

The female health care worker, whose name wasn't reported, didn't have any symptoms of the Ebola virus Friday when she arrived at Newark Liberty International Airport.

But that changed.

"This evening, the health care worker developed a fever and is now in isolation and being evaluated at University Hospital in Newark," New Jersey health department spokeswoman Donna Leusner told CNN.

The woman, who does not live in New Jersey, has not tested positive for Ebola. She has been isolated at University Hospital in Newark.

Earlier in the day, the governors of New Jersey and New York institute a new quarantine policy, under which any passenger who had contact with Ebola patients in West Africa would be placed in quarantine for 21 days. This policy goes into effect regardless of if the traveler appears healthy.

The health care worker was the first person to be quarantined under the new measures.

The new policy came on the heels of a positive Ebola diagnosis of a Doctors Without Borders physician Dr. Craig Spencer who tested positive for Ebola Thursday.

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Health care worker monitored for Ebola in New Jersey