Factual error: The film states that the 42nd blockade is located on the M602 motorway, 27 miles outside of Manchester. The M602 is 3.4 miles away from Manchester at its farthest point and is barely three miles in total. It is a very short motorway. It only has 3 junctions. The filming location was actually the M1, outside Milton Keynes.
Visible crew/equipment: When Jim is looking at all the notes on the wall, the camera pans in for a close up and you can see its shadow move over Jim's shoulder. (00:12:10)
Visible crew/equipment: On the shot of Jim walking across Westminster bridge there are visible crew/members of public on the right of the shot at the end of the bridge. (00:09:30)
Other mistake: When Jim, Selena, Frank and his daughter enter the supermarket, you can notice all the fresh produce (apples, carrots etc) looking fresh. This virus has been going on for a few days now, and supermarkets get their fresh produce out immediately. After 10 days or so, give or take, the fresh produce shouldn't be looking this fresh. (00:46:00)
Answer: Jim's parents did not get infected with Rage. They decided to commit suicide, hence the pills and alcohol beside the bed. They basically decided that it was better to die than become infected, hence the message on the back of the picture. Those that are infected with Rage, the length of time it takes to die probably relates to how they were infected. If they were infected through the mouth or something similar then they would live for a while, if they were infected through a serious wound then obviously they would become infected but would not live as long because of the serious injury.
Tallicame