Revealing mistake: During the scene where the military loses control of London, and their snipers are told "all targets are free", you can see heavy padding beneath Infected/civilian victims' shirts, etc, as they're shot. Presumably it's to stop them injuring themselves when they fall over, or to hold apparatus for the blood effects, but it's too bulky to be part of the characters' clothing.
Question: If the infected can sense the uninfected due to the uninfected smelling clean and scented (deodorant/perfume), wouldn't the closest approximation be to just stop bathing or showering, and not wearing deodorants/perfumes? Wouldn't one rather be dirty than dead? Am I over-simplifying the situation? Do the infected sense the uninfected using some other method in conjunction with the above, thereby nullifying my hypothesis above?