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CDC confirms 1st case of Ebola in U.S.

This scanning electron micrograph (SEM) depicts a number of Ebola virions. GETTY IMAGES/Media For Medical.

A patient being treated at a Dallas, Texas, hospital is the first person diagnosed with Ebola in the United States.

The Centers for Disease Control and Prevention (CDC) confirmed the positive result on Tuesday.

The CDC says the adult patient developed symptoms days after returning to Texas from West Africa and was admitted into isolation on Sunday at Texas Health Presbyterian hospital.

The Ebola outbreak has been centered in West Africa, though there have been concerns about international air travel and other factors.

The CDC says symptoms might not appear until two to 21 days after one is infected — which may contribute to its spread.

“Ebola does not spread from someone who’s not infectious, it does not spread from someone who doesn’t have fever and other symptoms, so its only someone who’s sick with Ebola who can spread the disease,” CDC director Thomas Frieden explained.

According to the World Health Organization more than three-thousand people in West Africa have died after being infected with Ebola.

According to the CDC, Ebola causes viral hemorrhagic fever, which can affect multiple organ systems in the body and are often accompanied by bleeding.