"This is a perfect example of confusing correlation with causation." You are confusing two different fields of science. This isn't physics where an action caus

"This is a perfect example of confusing correlation with causation." You are confusing two different fields of science. This isn't physics where an action causes a reaction. This is biology and the human body is a massive ecosystem. The 800 studies that "eventually" reached the WHO is the best way to determine a connection between two things. This is decades of research and maybe around 1million human subjects that were studied in total.