Was this virus like AIDS??
I recently watched the movie for a second time, and I have a different take on the ending than when I first watched it.
Originally, I thought that the virus had gone dormant for six months, and then, like AIDS, began to reproduce. My thoughts then was that everyone onboard the plane (and eveyone with whom they had contact) would also subsequently develop the disease.
However, on second viewing, I realized that perhaps there would have been only two people who would contract the disease: one, Professor Helms who had come in contact with the first victim's blood, and the flight attendant (Brenda Hopkins?) who gave him mouth-to-mouth recucsitation. The reason? Like AIDS, the disease has to be transmitted by bodily fluids.