Infectious disease physician led the agency during the 2014-2016 outbreak in Africa

Some 88 people have died from the highly contagious haemorrhagic fever in the DR Congo, with one death in Uganda, and at least 336 suspected cases.

Officials suspect the disease has caused 80 deaths in the Democratic Republic of Congo so far.

Ebola likely spread weeks before health officials knew about cases.

CDC says risk to Americans is low, but did not say whether any Americans were exposed in Africa