A 2-year-old child diagnosed provisionally with diphtheria and on examination she has greyish white membrane patch around her tonsils. The child has a 6-year-old sibling at home, who is fully immunized as per the schedule. What is the best measure to prevent disease in the sibling of the child
Full course of DPT Booster dose of DPT Nothing is required to be done Prophylactic erythromycin to be given