M.m.r Vaccine Amson is a pharmaceutical-grade vaccine/biologic commonly used in medical settings. Used for immunization or passive immunity in prevention and treatment of infectious diseases. Supplied by PakMeds, it comes from verified sources and is intended for professional and patient use under guidance. Caution: Use only under the supervision of a qualified healthcare professional. Store in a cool, dry place away from direct sunlight and keep out of reach of children.