This Plugin enables you to change the rate at which villagers get turned into zombie villagers.

In Minecraft if the difficulty is set to Hard, all villagers will turn into zombie villagers when killed by a zombie or similar.
In normal difficulty there is a 50 percent chance that the villager will turn into a zombie villager, or just die.

With this Plugin you can change that to anything you like, the difficulty of the game doesn't matter.

use the command changeinfectionrate <value> to change the rate. A message will appear in chat if the rate has been changed successfully.

The value entered must be a number between 0 and 100. It represents the percentage of a successful infection.
In example: If you use the command:
Then 70 Percent of the time, a villager that is killed by a zombie or similar, will turn into a Zombie villager.

This plugin can help to nerf villager trading a bit. By not having people cure villagers countless times without any risk.