I believe that MSM's constant covid fear mongering, along with all the "get vaccinated" ads being run, is going to cause some people to be so freaked out, they will go out of their way to get multiple vaccinations, thinking "if one protects me, more than one will protect me even more!" I think there will be some odd mental illness that causes some people to get some kind of emotional high out of being vaccinated, such that they might even feel depressed after a while, and then seek another vaccination. With all the odd mental illnesses out there, I don't think this is such a stretch.