No sub - clinical infection exists in -: (A) Polio, (B) Mumps, (C) Chicken pox, (D) Hepatitis A
Answer is C. .disease in which subclinical infections occurs includes,measles,rubella,mumps,poliomyelitis,hepatitis A and B ,japanese encephalitis,inflenza and diphtheria. ref:park&;s textbook,ed 22,pg no 91