That's a short short. I dunno. Just because they've got an issue in their vax doesn't mean it isn't being wildly distributed (and thus sold for profit) all over the world. Astra falling would be a long-term situation if it gets brought to court or scientifically proven to be harmful, which isn't something that is done in short timespans.

Good luck with it, for sure, but I'm not seeing the short being successful from an economist's point of view, their demand and supply are both quite high, and their risks are offset both by the massive existing sales, and most countries right now actually have laws against suing them if the vaccine kills their grandma (WHY they have those laws if it is perfectly safe I have no clue, but I know most western countries do).