FILE - In this undated colorized transmission electron micrograph file image made available by the CDC shows an Ebola virus virion.  Congo's Ebola outbreak has spread to a city, the capital of the northwestern Equateur province, a worrying shift as the risk of infection is more easily passed on in densely populated urban areas.
FILE - In this undated colorized transmission electron micrograph file image made available by the CDC shows an Ebola virus virion. Congo's Ebola outbreak has spread to a city, the capital of the northwestern Equateur province, a worrying shift as the risk of infection is more easily passed on in densely populated urban areas. CDC via AP, File Frederick Murphy
FILE - In this undated colorized transmission electron micrograph file image made available by the CDC shows an Ebola virus virion. Congo's Ebola outbreak has spread to a city, the capital of the northwestern Equateur province, a worrying shift as the risk of infection is more easily passed on in densely populated urban areas. CDC via AP, File Frederick Murphy

Correction: Congo-Ebola story

May 18, 2018 09:23 AM