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
Prophylaxis for health personnel working in plague ward is - 
Select and explain. 
A. Vaccine, B. Tetracycline throughout the duty, C. A course of tetracycline, D. Vaccine and Erythromycin
A: Vaccine
Answer: A: Vaccine 
Explanation: - immunisation with plaque vaccine is a valuable preventive measure. The WHO recommends that under all circumstances, vaccination should be used only for the prevention not the control of human plaque - the plaque vaccine is killed vaccine. - two doses of 0.5 &1 ml given subcutaneously at interval of 7-14 days. Booster doses are recommended after 6 months for persons at continuing risks of infection. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:296 <\p>