老年人免疫机能衰老,普通剂量,流感抗体消失快,约3~4月(记不清楚,懒得查了)。高剂量,抗体维持时间长,涵盖流行期。
老年人免疫机能衰老,普通剂量,流感抗体消失快,约3~4月(记不清楚,懒得查了)。高剂量,抗体维持时间长,涵盖流行期。
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