"The implications are obvious. The developing world has,by far, the largest pool of people at risk for severe and fatal H1N1 infections."

VOA: standard.2009.05.18

Risk pooling means they put a lot of people with independent or low-correlated risk into a pool and reduce the risk for the whole pool.

风险汇聚即,将独立或相关性小的风险汇聚起来,以降低整体风险

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