2. CDC boss appears before Congress

  • The Director of the CDC has appeared before a congressional hearing in Washington to discuss ebola crisis.
  • Thomas Frieden defended decision not to impose travel ban on passengers coming to the U.S from countries hardest hit by ebola.
  • Frieden said it was still unclear why two health care workers contracted ebola from Liberian patient in Texas.
  • Frieden said there was not yet a safe vaccine; Washington Post reports he confirmed that all 3 ebola patients in the U.S were treated with 'at least one' experimental drug.