Health authorities are monitoring for symptoms of Ebola in at least a dozen people who came into contact with a Liberian man before he was hospitalized in Dallas, moving to contain the deadly disease before it can spread further in the U.S.

Among those who had contact with the sick man, Thomas Eric Duncan, are five children, ranging from elementary to high-school age, as well as a small group of adults, state and local officials said at a news conference on Wednesday.

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