6项研究比较了疫苗单剂量与双剂量接种的效应其中4项研究显示双剂量接种比单剂量接种产生更强的免疫反应 结论 大部分covid-19疫苗具有较好的有效性和安全性推荐双剂量接种然而covid-19疫苗的长期有效性安全性及剂量年龄和工艺差异对保护效力的影响需要更多的研究证实 关.
Covid-19 疫苗比较表.
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