I reread the relevant passages about the accident and it does read as it were the disease which killed the people in the base, but… “as it were”, because it was never directly stated. The disease is described as being “anti-mutagen” which, for King’s purposes, meant (and this is in the novel) as the body develops defenses against the virus, it switches its attack while in the host, wearing the victim down. But the descriptions of the scene in the novel made it appear that it happened both instantly and with time to adjust - one person was face down in his soup (implying a death so quick he didn’t even notice others were dying), a couple decided to have one last quickie (implying they decided to fuck knowing the disease was going to overtake them…?)
So, to the question of what killed the people in the base, the best evidence is Captain Trips killed them, which makes little sense, as it wasn’t strong enough to kill Campion instantly.
Also, let’s go into something else I had an issue with…
Campion drove from Mojave, CA along I-40 to Texas, getting increasingly ill and passing it through CA, AZ, and NM (which is never mentioned as being among the first locations of Captain Trips, even though they have to be - Campion was driving and needed gas and food, so he surely stopped and infected others. (Sorry, Albuquerque.))
King mentioned that Arnette is in West Texas, but King sucks at geography, especially Texas geography (waves hi to “11.23.63”), and his Arnette has to be closer to Lubbock and Amarillo in the panhandle, given his description of how the virus traveled from Arnette in chapter 8. And the Panhandle isn’t usually what’s meant by “West Texas”… that’s Abilene, Midland, El Paso, Fort Stockton and the vast areas in between… the Panhandle is the Panhandle.
So… in that chapter (8) he has a NYC 87th precinct detective who drives his vacationing family from NYC to Orlando to go to Disneyworld, and then, on the return, end up near Amarillo, TX so he can do his part in the novel.
Uh, what?
Let’s take a look at that route, shall we?
NYC - Orlando: 1,072 miles
Orlando - Amarillo: 1,454 miles
Amarillo - NYC: 1,707 miles
Total mileage driving with the kids and wife in your 1978 Ford Country Squire Station Wagon: 4,233, or 76 hours @ the then-current 55mph.
lol. Did this guy have a months vacation? Did he just want to sit on his ass and drive for 6-10 days? What’s happening here?