The bottom line is that Ebola is hard to treat, and when the first patient ever with Ebola came to the United States, we thought the guidelines would protect the health care workers.

We have to keep up our guard. We won't get the risk of Ebola to zero in the U.S. until we stop it in West Africa. And Ebola is hard to fight. It requires intensity. It requires speed and flexibility.

I think we didn't recognize how hard it would be to care for someone with Ebola who was desperately ill in the U.S., and how much hands-on nursing care there would be, and we didn't expect two nurses to get infected.

Tom Frieden Quotes