If you show up at a hospital emergency department with a high fever and you just happen to have been traveling in Africa, don't be surprised if you get a lot of attention.

Hospitals are on the lookout for people with symptoms such as a high fever, vomiting and diarrhea who had been traveling in parts of West Africa affected by Ebola, following instructions from the federal Centers for Disease Control and Prevention.

On Monday, New York's Mount Sinai Hospital announced that it was evaluating a patient who had recently been in West Africa.

"Ebola Scare in City," the Daily News tabloid trumpeted on its front page. "Test result looms as NYers wait in fear."

But those fears, though perhaps a boon for headline writers, were misplaced.

Later Monday, the New York City Department of Health and Mental Hygiene announced that "after consultation with CDC and Mount Sinai, the Health Department has concluded that the patient is unlikely to have Ebola."

The CDC's health advisory gives very specific advice on whom to screen for possible exposure and when to test people's blood for antibodies to the Ebola virus.

The CDC recommends that hospitals only test people who get a high fever within 21 days of having a "high-risk exposure," defined as contact with blood or bodily fluids of someone known to have or suspected of having Ebola.

So far hospitals around the country have reported 22 suspected cases to the CDC, an agency official said Monday, and only four met those requirements for testing.

"Malaria diagnostics should also be a part of initial testing because it is a common cause of febrile illness in persons with a travel history to the affected countries," the CDC said in its advisory.

Indeed, two of the four people tested had malaria, not Ebola. A third also tested negative for Ebola, and results are pending in the fourth person.

Public health officials continue to note that U.S. hospitals are well versed in infection control procedures that would contain the Ebola virus, which because it is not airborne is harder to spread than tuberculosis or SARS.

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