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Frieden listed a number of new procedures the CDC is considering implementing into the protocol for health care workers treating potential Ebola patients in U.S. hospitals. Those would include evaluating the protective gear being used by health care workers, having CDC inspectors observe personnel as they remove personal protective equipment outside of infected patients’ rooms, conducting full-body spray downs to decontaminate health care workers, and looking at whether or not medical equipment such as ventilators and dialysis machines – sometimes necessary for treating Ebola patients – can harbor the deadly virus after use.

Though breaking these protocols could indeed cause a person to become infected, it is equally likely that airborne aerosols are a cause. Take a look at the information in this thread, from a very credible source*:

To summarize, for the following reasons we believe that Ebola could be an opportunistic aerosol-transmissible disease requiring adequate respiratory protection: •Patients and procedures generate aerosols, and Ebola virus remains viable in aerosols for up to 90 minutes. •All sizes of aerosol particles are easily inhaled both near to and far from the patient. •Crowding, limited air exchange, and close interactions with patients all contribute to the probability that healthcare workers will be exposed to high concentrations of very toxic infectious aerosols. •Ebola targets immune response cells found in all epithelial tissues, including in the respiratory and gastrointestinal system. •Experimental data support aerosols as a mode of disease transmission in non-human primates.

Risk level and working conditions suggest that a PAPR will be more protective, cost-effective, and comfortable than an N95 filtering facepiece respirator.

CIDRAP: "We Believe There Is Scientific Evidence Ebola Has The Potential To Be Airborne"

(* -- "The Center for Infectious Disease Research and Policy (CIDRAP; "SID-wrap") is a global leader in addressing public health preparedness and emerging infectious disease response. Founded in 2001, CIDRAP is part of the Academic Health Center at the University of Minnesota." )