Old drugs of any kind become generic meaning they can be made by anyone meaning there’s competition meaning you can’t charge as much. New drugs, even if you’re just making a minor adjustment to an existing drug, like adding a smooth coating to make it easier to swallow, can be sold under a brand name and sold by the patent holding company exclusively for more money.

Now imagine if the old generic drugs lost their patent entirely. You could make a new one with some minor change that might not even get approved otherwise like a slight change in dosage or vaccine scheduling or a slight change in the manufacturing process. Now you can functionally renew the patent back into brand name status and charge more with 0 competition. Negotiate with your big Pharma buddies to divvy up who gets exclusive rights to each vaccine and PROFIT.

They’re already doing it. We’re already seeing pharmacy shortages of old generic blood pressure and blood thinner meds in favor of newer brand name ones even though many patients have been stable for years on their older medications. Why should vaccines be any different? It was literally the reason Wakefield started the whole vaccines cause autism thing to begin with; he wanted people to start using his vaccine instead.