Carriers are important source of infection in all, EXCEPT:: (A) Measles, (B) Mumps, (C) Diphtheria, (D) Typhoid
Answer is A. Ans. is 'a' i.e. Measles Sources of infection :Measles : The only source of infection is a case of measles.Mumps : Both clinical and sub clinical casesDiptheria : 95% carriers and 5% clinical casesTyphoid : case & carriers