# COVID-19 und unspezifische Wirkungen von Impfstoffen: BCG (Bacillus Calmette-Guérin), Polio, MMR (Masern-Mumps-Röteln). 7 This page does not yet have an agent-readable markdown version. Canonical: https://diagnosticdetectives.com/products/covid-19-and-non-specific-actions-of-vaccines-bcg-poliomyelitis-mmr-7