I kind of doubt that claim that one dose cures it. I doubt if many diseases would help. If you read the articles, it doesn’t cure herpes simplex, but can help control it. It also can lead to wasting away when used in chickens. If studies were done on this, I am sure there would be more articles online about it. I googled a few older articles that mentioned L Lysine in the articles about Mareks, but they were a little to scientific for me to get much info.