![Image](http://people.williams.edu/cthorne/files/2010/08/28weeks-runners.jpg)
slow zombies are the traditional ones from day of the dead etc. Just shamble along and moan, usually walk around in huge numbers, reanimated corpses and seek to eat flesh
![Image](http://www.moviemobsters.com/wp-content/uploads/2010/10/Dawn-of-the-Dead.jpg)
Which do you feel are worse?
Consider long term as well since the fast ones are just infected humans and die out quicker.
I think the sprinters are worse. 28 days later was scary because of how crazy they were, all they had to do was sense you were around and the next second you've got a whole herd sprinting after you like usain bolt. If these guys attacked anyone who didn't exercise regularly would be killed in a day.
though slow zombies are still super creepy and probably have a greater long term psychological impact due to the moaning, and the constant thoughts of being eaten alive rather than just furiously attacked like the fast ones are much more disturbing