ring vaccination的意思|示意

The strategy of ring vaccination emerged and was validated, vastly simplifying operational and logistic demands.

环带免疫战略的产生和验证，极大地简化了操作和物流需求。

It involved a procedure called ring vaccination, in which clusters of people who were particularly at risk were offered the chance to be vaccinated.

试验包括包围接种这一步骤，在这一步骤中，处于尤其会被感染危险的群体被提供了接种机会。