<prompt> Prophylaxis for health personnel working in plague ward is -VaccineTetracycline throughout the dutyA course of tetracyclineVaccine and Erythromycin  <response>: - 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 : Parks textbook of preventive and social medicine, 23rd edition, pg no:296 p 