美国食品药品监督管理局（FDA）在一份声明中指出，为老年群体提供最佳防护效果的流感疫苗，实际上属于高剂量流感疫苗中的一个特定子类别。该机构强调，此类疫苗本应作为相关研究中的适当对照组，以确保试验数据的科学性与可比性。
美国食品药品监督管理局（FDA）在一份声明中指出，为老年群体提供最佳防护效果的流感疫苗，实际上属于高剂量流感疫苗中的一个特定子类别。该机构强调，此类疫苗本应作为相关研究中的适当对照组，以确保试验数据的科学性与可比性。
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