This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
In a plague epidemic all of the following are done to control it, EXCEPT: 
Select and explain. 
A. Isolation of contacts, B. Vaccination of the susceptibles, C. Surveillance, D. Chemoprophylaxis with tetracycline
B: Vaccination of the susceptibles
Answer: B: Vaccination of the susceptibles 
Explanation: Ans. is 'b' ie Vaccination of the susceptibles Vaccination is used only for prevention and not for control of an outbreak.Immunity with vaccination develops in 5 to 7 days, therefor to be effective, vaccination should be carried out at least a week before an anticipated outbreak.Steps taken for controlling plague epidemicEarly diagnosisNotificationIsolation of casesTreatment with streptomycinDisinfection of sputum, discharges and articles soiled by the patientControl of FleasChemoprophylaxis with tetracycline Surveillance.9) Health educationAlso remember DOC for treatment of plague > Streptomycin* DOC for Chemoprophylaxis > Tetracycline*