What kind of face protection did they have? I think that should be of equal or greater concern. Aerosolized, virus contaminated bodily fluids from sneezing, coughing, projectile vomiting, explosive diarrhea can stay suspended in the air for a long time and a face shield and N95 mask is not sufficient protection.
This is a link to the PPE from the CDC website (Ebola portion of that website):
http://www.cdc.gov/vhf/ebola/pdf/ppe-poster.pdf
Also interesting to note that the CDC quarantines monkeys and birds for 30 days... specifically mentioning to prevent the spread of diseases like Ebola.