what science fiction movie is about a vaccine that everyone must get. the vaccine turns out to be alien or something of that sort, evilll or whatever. there's a mom and a kid as the main characters and they don't want to get the shot. towards the end of the movie they're in a city grocery store trying to buy medicine for the boh because he's a diabetic . Im not sure how it ends but it's really crazy and not knowing what it was is killing me. please help me