Experts discounted the possibility that terrorism is the source and believe it almost certainly is a contagious infection that spreads most easily from victims to their doctors, nurses and families through coughing, sneezing and other contact with nasal fluids.
I love this. Seems to me like all it would take is half-a-dozen or so martyrs from the religion of peace willingly exposed to the contaminant, and then once contagious, sent on a world-wide shopping spree for 24 to 48 hours.