Yeah, bacteria are particularly nasty, they can do horizontal gene transfer creating massively antibiotic resistant strains that are not related at all to the o

Yeah, bacteria are particularly nasty, they can do horizontal gene transfer creating massively antibiotic resistant strains that are not related at all to the original owners of the individual resistance genes. Movies can handwave Nipah/Hendra like viruses reassorting or recombining with measles like viruses, but what already has happened with bacteria is like measles, 1918 flu, and SARS-CoV-2 combining together somehow to become impervious to all treatments and vaccines without any loss of fitness function.