This just came through my feeds. For folks heading to Between The Worlds / Sacred Space worth noting.
I really like The Cleveland Clinic's pages for clear medically based explanations...
-How long does the MMR vaccine last?
Most people who receive the MMR vaccine are protected for life against measles and rubella. While the vaccine is also effective at protecting against mumps, some people may lose immunity to the disease over time. You may need an additional dose during a mumps outbreak.
https://my.clevelandclinic.org/health/procedures/mmr-vaccine
Also worth noting that Walmart, Walgreen's, CVS, & GoodRX, all have information about ***free or low cost*** vaccinations for those who have concerns.
Stay safe & healthy out there folks!