Hear me out, measles can cause immune system amnesia. People with autoimmune disorders have immune systems that want to kill them. What if we use the immune system amnesia property of measles to reset the immune system of people suffering with autoimmune disorders? Maybe we could do some crispr on the measles virus to make it not as dangerous or something like that first though.
not an immunologist; i don’t want to undersell this to you: immunology is fantastically complex subject with many redundancies, feedback loops, and frustrating number of moving parts, many of which are still unknown in sufficient detail. that said, if you want any chance for it to go: first you’d have to figure out what exactly mealses virus does, then you’d have to find a disease that can be cured or treated by obliterating whatever mealses virus is obliterating, and then if there’s any match (big if) it’ll probably still won’t work just with wild type virus and require significant modifications. and even then, that effect as is known in mealses today is not very reliable and lasts only months to years. and even then, there might be other approaches that are safer or more reliable or both
maybe in the course of figuring the first one there will show up an option to modify mealses virus in some significant way that might allow it to target something else, and maybe target other kind of disease, because in no way it’d be a blanket cure for all immune diseases ever. maybe someone made an observational study already that tracked how prevalence of some immune diseases changes after mealses infection, but many of these are rare diseases and it’d be massively hard endeavor