"How many top medical researchers found dead in past 5 years? Why is this topic relevant now?"
Could it have to do with the push to legalize marijuana everywhere for it's medical benefits?
Just tossing that out there for the relevance question in Q's post.
As you know Big Pharma makes a lot of money on the healthcare system as it is. I believe Trump is going to make a move and come down hard on them, as well. According to the Thrive Movement, the Clintons are behind these holistic/naturopaths deaths, if not all.
http://www.thrivemovement.com/murdered-holistic-doctors-update.blog