system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Congenital passive immunity is NOT found in -
assistant
The correct answer is  The maternal antibodies gradually disappear during the first 6 months of life. Immunity following injection is fairly solid although reinfection can occur since infection with one type does not protect completely against the other 2 types of viruses (refer pgno:205 park 23rd edition)