Health experts are rushing to determine how Pham contracted the virus. They propose several scenarios, including that she was infected while Duncan was being intubated or receiving kidney dialysis, both procedures with a high risk of contact with infected materials. Templeton University doctor Eileen Farnon, who formerly worked at the CDC and led teams investigating past Ebola outbreaks in Africa:
Removing the equipment can really be the highest risk. You have to be extremely careful and have somebody watching you to make sure you remember all the steps.
Dr. Dennis Maki, University of Wisconsin-Madison infectious disease specialist:
I can have on the suit and be very careful, but I can pick up some secretions or body fluids on a surface