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Emergency vehicles are at the apartment of a health worker, the first person to contract the virus inside the United States, who has tested positive for Ebola in Dallas, Texas, October 12, 2014 (Credit: Reuters/Lisa Maria Garza)

Emergency vehicles are at the apartment of a health worker, the first person to contract the virus inside the United States, who has tested positive for Ebola in Dallas, Texas, October 12, 2014 (Credit: Reuters/Lisa Maria Garza)