Question: When Russell becomes infected, he tells the sheriff that he has saved him three times, yet I've seen the movie twice and saw Russell only save him two times (when he unplugs the razor machinery in the morgue and shoots a crazy through the window). Did I miss the third one?
Answer: The third time is by not shooting him right there.
Answer: When Judy was tied up in her baby room after the sheriff stabbed the other mom in the neck.
Question: If the government killed everyone regardless if they were infected or not, why didn't they save themselves all the trouble and just nuke the town from the get-go?
Answer: Probably because using a nuclear weapon on a single small town within the US would a) call a ridiculous amount of attention to what happened and invite the kind of speculation/investigation the government wants to avoid; b) destroy or contaminate a huge area beyond the "problem" zone, killing tens of thousands, if not millions, of innocent people; and c) be considered, at best, a horrendous accident and at worst a terrorist attack, and either way would lead to who knows what consequences. For these and probably hundreds of other reasons, in this and literally every other scenario in movies and in reality, nuclear weapons are never considered the "from the get-go" option.
Question: Why did the soldiers shoot the non-infected people in the cattle trucks? Is there something going on here that I missed? Does everybody have the virus?
Answer: Possibly because the Government didn't want word about the virus getting out to the general public so they ordered the solders to shoot the non infected people in order to silence them all, and then created a cover story about a chemical plant exploding in the town.
Answer: At this point, the army had decided to simply kill everyone from the town, rather than risk the infection spreading and to save the time and trouble of checking whether people were infected or not.
Also, they probably wanted to contain knowledge of what they'd done. No witnesses.
Question: If there are roadblocks to leave the town, and it took a great distraction for the sheriff to cross, how did the 3 hunters cross the border to the gas station? And where did the 3rd one go? The sheriff set one on fire and his wife shot another one.
Answer: The 3 hunters were last seen the night before David and Judy got to the gas station. That was the same night that David and all those people were hauled to the gas station. They probably drove there following the cars and no road blocks were set up yet. You can also hear the military say when they are in the barn at the McGregors' farm that the military is pulling back to the perimeter. They likely set the road blocks up after that. As for the 3rd hunter he may have been the dissected corpse on the top of their pickup truck. I'm not entirely sure on that one.
Actually, all three hunters were there. He walked into the cooler of the restaurant. Check it out.
Question: How come the Government soldiers didn't tell the whole town Including the sheriff what's going on when they've all been captured?
Answer: Movie governments (and real-life governments) are known to keep things from the public for their own safety, whether it's a good idea or not.
Chosen answer: Because he's naturally immune to the disease, just like all of the other survivors at that point.
Phixius ★