Was playing Virus when I found this guy camping in the corner wth a piece of TNT in front of him as well.
With this spot he was able to face his shotgun one way and all he would do is click to shoot his shotgun whenever a zombie would get to close. It was nearly impossible to be able to infect him, just a very cheap corner.
“Why don’t you just quickly run in and infect him”
The problem with this corner is that when getting inbetween the blue table and the wall, you would need to face sideways and then enter like that because of the hitbox of your character.