Being a parent, how do we know the preparation of vaccine is faulty or not? The Government supplied OPV vaccine was given to my child. My child's OPV vaccine details are this way. At birth, he had OPV. During six weeks, OPV and IPV was administered, in 10 weeks OPV and IPV was given, in 14 weeks OPV was given along with IPV and in 17th month he had IPV booster dose. On that context, I would like to know, whether my child has any chance to develop any physical problem in future?