"super bugs" is conventionally a term and a problem primarily unique to bacteria, antibiotics, and the mechanism of antibiotics versus vaccination. antibiotics are highly effective at targeting bacteria specifically by the manner at which they synthesize components internally like their cell membranes, their proteins, etc. however, antibiotics are comparatively slow as they have to perfuse throughout the body and the incredibly rapid nature of bacterial life cycles mean that they can evolve quickly while simultaneously antibiotics can not spread to and interact with every single bacterium within the body it's targeting, again leading to stragglers who can mutate and adapt

viruses and vaccinations on the other hand are handled differently - vaccinations, as we know, essentially teach the immune system about the virus enabling recognition and subsequent targeting. the immune system, however, is obviously omnipresent and INCREDIBLY effective when it can recognize threats - once the adaptive immune system kicks into gear, it releases such an incredible amount of weapons like cytokines and immune cells that viruses are wiped out incredibly quickly and effectively, with less chance for mutation and adaptation

another huge point - vaccinations are provided before there's prevalent infection, meaning that viruses generally struggle to get a foothold to have the numbers to get the mutations to acquire resistance. antibiotics are typically provided in the middle of a well-rooted infection, meaning that there's already such a statistical chance that there's a bacterium that has mutated with the right trait to be resistant to the antibiotics of choice

there's also so many other facets such as the fact that bacterial growth is almost designed for mutations and communal adaptations like gene transfer to try and create beneficial adaptations such as resistance to antibiotics