Bit confused by the military base at the beginning
In the beginning of the book, shortly after the scene where Campion arrives (and dies) in Arnette, there's a scene with Starkey looking at a bunch of monitors. In one a biologist is dead on the floor of a lab. In another, the cafeteria shows people with their face in their food. Yet another shows people crumpled in front of a vending machine.
Is it to be assumed that because they were at ground zero of Captain Trips, those at the base essentially just dropped dead from it instead of getting the flu symptoms?
This is the 5th or 6th time I'm reading it and I just realized that (at least as far as I can recall) there's no reason given why these people died immediately instead of getting sick first. I know that Starkey's inner monologue (when he is explaining his son-in-law's suicide to his daughter) says that there was a breach and Campion happened to see the numbers go red with just enough time to escape the base. However, I'm still curious about those I mentioned above.