AZ疫苗和辉瑞疫苗效力下降速度

in #cnlast year

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AZ疫苗和辉瑞疫苗效力下降速度

牛津大学根据英国国家统计局(Office for National Statistics)在去年12月到今年8月之间,随机抽选对象所做的PCR采检,做出了此报告,但此报告尚未经过同侪审查。

分析70多万件COVID-19的PCR结果后,研究发现,接种第2剂辉瑞一个月后,对于高病毒含量感染的保护效力比未接种者高90%,两个月后降至85%,3个月后降至78%。

接种第2剂AZ疫苗一个月后,对于高病毒含量感染的保护效力比未接种者高67%,两个月后降至65%,3个月后降至61%。

也就是说,在初期的时候,辉瑞的保护力较高,AZ的保护力较低,但辉瑞的保护力降低幅度较大,AZ的保护力降低幅度较小,在6个月~8个月之后,两者的效力可能都不高,且相差不大,更长期的保护力变化,则仍有待研究。

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