It is passively good for health as it reduces the need of other power plants such as coal power plants or nuclear power plants which are much more damaging for health due to the release of gases and chemicals into the atmosphere. And as for wind farms they don't really do anything that can be considered harmful as their only engine is wind.
I have heard literally nothing about this. And it doesn't make sense either. Wind mills have been around forever, I don't think the modern ones are much different. I did a school project on wind mills and found out that the only negative aspects of them are that some people think they're ugly and that birds can fly into them.