Lawmakers are increasingly concerned about the spread of Ebola and worry that it could jump to the United States and become more contagious.

President Obama on Tuesday unveiled new plans to surge U.S. support to West Africa that includes sending thousands of U.S. military personnel to the region and establishing a command-and-control center, and new hospitals to aid in the fight.

But lawmakers worry the president’s efforts might not be enough to contain the outbreak. Already, an estimated 2,400 have died from the disease, and the United Nations estimates $1 billion could be necessary to limit the epidemic.

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