<prompt> For every clinical case of poliomyelitis subclinical cases are -500 in children and 75 in adults500 in children and 25 in adults250 in children and 25 in adults1000 in children and 75 in adults  <response>: It is estimated that for every clinical case, there may be 1000 subclinical cases in children and 75 in adults. Ref :PARK;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page:205 