从流行病学和经济学的角度来看，最大的收益是防止疾病的继发。
The biggest payoff epidemiologically and economically is in secondary prevention.
从经济角度来看，这些个体的花费也是巨大的。
Also from an economic point of view, the cost to these individuals is huge.
从经济角度来看，这些个体的花费也是巨大的。
Also from an economic point of view, the cost to these individuals is huge.
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