Which vaccination strategy is described by ring vaccination around cases and contacts?

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Ring vaccination focuses on vaccinating the people most at risk around each new case—the patient’s close contacts and often the contacts of those contacts—creating a buffer of immunity that blocks transmission. This approach is particularly useful when vaccine supply is limited or rapid containment is needed, because you vaccinate only those most likely to be exposed rather than the whole population. It hinges on quick case identification and thorough contact tracing to draw the circle of people who could be infected and would benefit from vaccination. The strategy described fits exactly: vaccinate around cases and their contacts to interrupt spread. In contrast, mass vaccination aims to immunize large portions of the population regardless of exposure, no vaccination means no protection at all, and staff-only vaccination targets a narrow group rather than forming a containment ring.