A recent traveler to West Africa who was being evaluated for Ebola symptoms at Denver Health Medical Center tested negative Monday for the virus, state health officials said.

The man was tested “out of an abundance of caution,” the state said.

The man, from the Arvada area, had a low-grade fever Sunday night and continued to have one Monday, officials said. Denver Health issued a release Monday morning saying he would be tested.

The Colorado Department of Public Health and Environment later said hospital, federal and local public health officials determined the patient was a low risk and did not warrant testing for the deadly virus.

However, no other diagnosis has been made in the case, and physicians and officials from the hospital, CDPHE, CDC and Denver and Jefferson County health agencies officials conferred again. They decided to test a specimen overnight even though “the patient’s condition has not deteriorated,” according to a CDPHE release.

The man will continue to be hospitalized for further observation. He is being cared for in an isolated unit.

The man will be tested again until it’s clear his symptoms are not related to Ebola.

“It still represents a very, very low risk for Ebola,” CDPHE director Larry Wolk told The Denver Post. “But it’s an evolving situation.”

Even if first tests are negative, he said, additional testing could be conducted over the next few days because it can take up to three days after symptoms begin for the virus to reach detectable levels.

“We are taking all the necessary precautions to protect both our patients and staff, even though the infection with the virus is not confirmed,” Dr. Connie Price, Denver Health’s chief of infectious diseases, said in a statement. “We have staff trained specifically to assist with patients who may have contracted the Ebola virus.”

The patient is being held in a designated inpatient care unit as a precaution. The unit is isolated from other areas of the hospital, and the patient is being cared for by specially trained staff, the hospital said.