TRENTON (AP) -- New Jersey health officials say a woman who arrived at Newark Liberty International Airport from West Africa has tested negative for Ebola in a preliminary test.

University Hospital in Newark (University Hospital)

The New Jersey Department of Health says the woman remains under observation and in isolation at University Hospital in Newark on Saturday. She is a health care worker who arrived Friday from West Africa, where she had contact with Ebola patients. She initially showed no symptoms of the virus but later developed a fever.

The woman became the first traveler to be quarantined under an Ebola watch in New York and New Jersey. The governors of those states earlier Friday announced a mandatory 21-day quarantine of medical workers and other airline passengers who have had contact with Ebola victims.

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