I'm so sorry to hear about your friend.

This is exactly why we continually warn people about the dangers of many vaccines which still have mercury in them.

Emotional issues are often the hallmark of early or lesser mercury poisoning. I've spoken to so many over the years who suffer, and in fact I believe many-time more suffer but just don't know it. They have common diseases like heart disease, arthritis, diabetes, vision issues, etc., etc, and there doctor has no ideas that it's all rooted in mercury poisoning.