Absolutely not. Not sure why you would say that. 28 Days Later is not an sci-fi action movie at all. If anything, Children of Men had much more action with the car chase and all those gunfights in the last 45 minutes. Maybe you should see it again, they fall into the exact same category. Except that CoM had a pseudo message about it that could be summarized in a fortune cookie I couldn't disagree more. The only thing the two movies had in common was that they began in London and ended somewhere else. Go ahead and summarize the "message" in Children of Men that could fit on a fortune cookie, just so I can see how much stuff you missed.