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Nigeria has confirmed eight new suspected cases of the Ebola virus Tuesday. All eight had come into contact with Liberian-American Patrick Sawyer, who died from the virus after landing in Lagos airport last month.

The country is the fourth to have confirmed cases of the virus, following the outbreaks in Guinea, Liberia, and Sierra Leone. According to the latest W.H.O. report, 887 people have died of Ebola across West Africa.

The news comes the same day the second American infected in the outbreak, Nancy Writebol, arrived in the U.S. to be treated at Emory University Hospital in Atlanta, the same site where the first American, Dr. Kent Brantly, is also staying. Both have received doses of an experimental serum and have shown improvement. 

Stateside, a man in New York City's Mount Sinai Medical Center is undergoing testing for the virus after recently traveling to West Africa and exhibiting symptoms that could be attributed to Ebola. Health Commissioner Dr. Mary Basset said in a press conference, however, that the patient most likely does not have the disease, and that the city would be prepared to combat Ebola if it were to arrive:

I think what we learned from this is that people who are potentially affected with Ebola are rapidly identified, action is taken rapidly to ensure that they’re isolated, and the public’s health is protected.

Overseas, Saudi Arabia announced it is testing a man who showed symptoms of Ebola after a recent trip to Sierra Leone. 

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