名词
中文翻译：后疫苗的
同义词：
['post-vaccinal', 'post-vaccination']
例句：
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1. The vaccine was designed to protectagainst the virus.
这种疫苗旨在预防病毒。
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2.The postvaccinal effect of thevaccine is still being studied.
疫苗的后效仍在研究中。
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3. The postvaccinalsymptoms typically subside within a few days.
疫苗接种后的副作用通常在几天内消失。