Thats what my dad used to do when he had the flu - pour a tumbler of Scotch, swill it down, wrap himself in about 6 blankets, and go to bed for 48 hours. He’d wake up cured.
We called it the “Scottish Sweatlodge” LOL.
I sweat out every cold or flu bug I get close to getting. I have an extra set of sheets and blankets on hand for this. I start with the electric blanket on high until The towels are soaked through and through and then switch sheets and do it again. Took me eighteen hours last weekend. I’ve been great since then.