Forty-eight hours before the incident the pilot was in perfect health. He received a vaccination. When he was on final he had an attack, and his words were,”%#?$& vaccine”.
Watched it the other night and had a hard time understanding what was going on, but if you watch some of the things that happen in the movie and think about what is happening to all of us currently the resemblance is quite startling. Read the sign on the door when Neo is locked up, and compare it to Australia today.