Saw an article suggesting that previous Flu vaccines had proteins similar to COVID proteins and that your body would be primed to react to COVID proteins with an allergic response. So having taken the flu vaccine could make COVID outcomes worse.
This makes sense that antihistamines that suppress the allergic reaction would help prevent damage. Pepsid is also a antihistamine and has been suggested for a long time.
There's no money in it and the government health agencies run by Fauci are not interested.