I keep infecting the people with the zombie virus and they won't turn into zombies anymore i tried to kill them and they still won't turn. After the new update i can't make a zombie invasion the people health won't decrease. Can somebody tell me what happened and what to do. Did they removed zombie transformation from the game?

you just have to wait a bit
how were u killing them? with the life eraser?

You gottal kill them

Do you have the plague Dr near where you placing those people maybe he's curing them