Incubation period of vaccine associated paralytic poliomyelitis is: (A) 1-2 hours., (B) 1-3 days, (C) 7-10 days, (D) 4-30 days
Answer is D. Vaccine derived paralytic poliomyelitis (VAPP) : Develop paralytic polio after 4-30 days of administration of OPV Poliomyelitis among contacts of OPV : Develop within 7-60 days after exposure to recent OPV - recepient Ref: Human vital pathogens by Liu 1st edition Pgno : 79