Yeah, I don't remember them removing any protocols or drugs, but Covid 19 is/was a Novel Coronovirus. Ie, it was/isn't the common cold. And if I remember right, it wasn't until, say, the Delta variant came out that it got pretty bad mortality wise. There was a period in there when Springfield hospitals were so overwhelmed that they were sending patients to Kansas City, 4 hours away. Winter/spring of 2021, I think. This was in the least vaccinated part of the State, and the death toll was bad. I don't think it's that the treatments changed so much as the virus itself changed.