It's not up to you to stop it, but if someone else doesn't stop they are in deep trouble.You're right, all the posts from that point on should have been moved to a new thread. I think it's OK for a post or two to go off topic but when it's clear it's taken on a life of it's own, that's when the whole thing needs a new thread and a new title. It's only fair to the OP.
And it isn't up to me to stop anything. I'm not in charge here.
And then you said this, which easily could have been replaced with the answer.
"Yes, but it's common knowledge that both drugs and infections cause oxidative stress. There's nothing earth shattering in that statement."