“I really don’t understand what you’re saying here. I’m not a Boki in statistics, but why can’t they just assume that most MBP didn’t cause HSV?“
Because scientific medicine, which for better or for worse seems to be considered ????? ??? ?????, is not based on assumptions. Which is why every reliable study published in every reliable medical journal clearly states the limitations of the study and possible confounding variables (which of course is something that you, as a self proclaimed expert in medicine, already knew).