Yes, I read the whole thing but I missed the second half of the last sentence of the second paragraph. The fact that one poster replied that it's due to the adv

Yes, I read the whole thing but I missed the second half of the last sentence of the second paragraph. The fact that one poster replied that it's due to the advent of synthetic hormones and others replied about the spread of CJD indicates it's not super clear, but sibling replies got me the insight I was looking for.