[neverending]

I think your choice of material is good. Zombie lore is very popular. Your excerpt is too talky though. That may seem a strange comment to make about a radio broadcast- but if you listen to War of the Worlds, there are no long passages of description like this. It is presented in the form of live news coverage of events as they happen- short bursts of description with sound effects, mixed with interviews of on the scene participants.

This effect could be carried out with your script. It could be presented in the form of an on the scene audio diary. For instance- when he's examining tthe boy, he calls out to the villagers and orders them to help him. We hear them protest, and we hear the Dr. persuade them. Then he describes what he sees, in its gruesome detail, as the boy's arm comes off... He doesn't tell us there was banging on the door- we hear it, as we hear the boy's calls....

Good marks for subject matter. Low marks for execution. You've done much better.