Facts: Measles is unlike other viruses. It seriously damages 11%-73% of a patient’s antibody stockpile. A 2015 study estimated this: Before vaccinations, when measles was common, the virus was likely implicated in 1/2 of all childhood deaths from infectious diseases https://www.nbcnews.com/health/health-news/measles-immune-system-brain-swelling-long-term-rcna195918