You think you’re joking. Check out Oscillococcinum (I think that’s the spelling) for flu. Or, better yet, essence of Berlin Wall.
When I went to get my flu shot I saw the flu remedy on the shelves at Walgreens. In the general chit chat with the pharmacist, I mentioned that if the vaccine let me down, it was good they had a placebo for sale. She didn’t know what I meant…was even more gobsmacked to learn what wasn’t in the sugar pill.
Quack! Quack!