Damn I hate saying this... but, to be fair to the pharma corps... ugh, I feel sick for saying that... manufacturing vaccines isn't like making plastic cups and straws. I'm in no way qualified to explain pharmaceutical production, but I highly doubt it's that simple to just Thanos snap produce these things. Equipment, QC, materials, whatever, it takes time. This on top of still having to produce all the other drugs we need to keep their pockets lined. Part two, I remember seeing something regarding specialty freezer storage for shelf life and general transport. I believe that's still valid? Not everywhere has the logistical bandwidth for transport or storage of this. Then take into the legally abiding procedures to ensure the safety of the drug itself, which we should all be thankful for. Piss poor pharma is already a problem as is, we don't need more issues. Then general legal hurdles of deployment and tracking, yada yada. This isn't like sewing up a mask, bubble wrap Fedex it out. Damn it, I defended pharma. I'm going to Hell for that.