Yes, and it is becoming a larger movement. It is still small by any measure but the movement has grown a fair bit in recent years. Be it mostly from people wanting a laugh or true belief. For a while it was pretty much dead.

I think we all underestimate the whole anti-science and intellectual movement. People will and have denied everything you can think of.

Though exceptionally rare, there are people that deny the Germ Theory of Disease. A few of them even have MDs, somehow. Usually to sell de-acidification junk.