“Measles parties” were a bad idea even before the measles vaccine became available in 1963. Measles is dangerous: otitis media 7–9%, pneumonia 1–6%, diarrhea 8%, postinfectious encephalitis 1/1,000, subacute sclerosing panencephalitis 1/10,000, and mortality 1/1,000. https://arstechnica.com/health/2025/02/texas-official-warns-against-measles-parties-as-outbreak-keeps-growing/