T50.Z91 - Poisoning by other vaccines and biological substances, accidental (unintentional) T50.Z - Poisoning by, adverse effect of and underdosing of other vaccines and biological substances T50.Z9 - Poisoning by, adverse effect of and underdosing of other vaccines and biological substances T50.Z91 - Poisoning by other vaccines and biological substances, accidental (unintentional)