针对传染病的易感人群接种疫苗是一种有效的预防传染病的措施.疫苗是病毒等微生物制成的疫苗在免疫学上被称为 A抗体b抗原c病原体d Template




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tomski针对传染病的易感人群接种疫苗是一种有效的预防传染病的措施.疫苗是病毒等微生物制成的疫苗在免疫学上被称为 a抗体b抗原c病原体d coloring