Where did you get the idea that MAGA folks are anti vaccines? Some are, as well as some on the Left. If you want to point to one thing causing the recent rise in infectious diseases then look at letting in over 12 million people from mostly developing nations with no health checks in the last four years. Why would infectious disease in your estimation be likely to rise because some don't get vaccines in a country where those diseases have been under control some time now but letting in millions from the poorest countries would not be concerning? With legal immigration criminal backgrounds are not only checked but also current health status. It matters that these things are followed but the Biden administration ignored that.