Secondary attack rate of peussis in unimmunization household contacts of peussis: (A) 30%, (B) 40%, (C) 60%, (D) 90%
Answer is D. Ans. is 'd' i.e., 90% SAR of some impoant infectious diseases Measles Rubella Chicken pox Peussis Mumps 80% 90 - 95% -- 90% -- 90% 86%