The inactivated virus vaccine does not have this side effect, but multiple doses are required in order to provide protection which may prove problematic in endemic areas.
灭活病毒疫苗没有此种副作用，要提供保护则需要多剂量，但在流行地区这可能证明是难以解决的。
The inactivated virus vaccine does not have this side effect, but multiple doses are required in order to provide protection which may prove problematic in endemic areas.
灭活病毒疫苗没有此种副作用，要提供保护则需要多剂量，但在流行地区这可能证明是难以解决的。
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