This retrospective study of incoming travelers with coronavirus disease 2019 showed that individuals immunized by messenger RNA vaccines had significantly longer postvaccination intervals (median, 30.5 days) to breakthrough infection, lower white blood cell counts and lactate dehydrogenase levels on admission, and fewer radiographic abnormalities than those immunized by inactivated virus vaccine, who paradoxically had lower respiratory viral load.

中文翻译：

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2019 年冠状病毒病信使 RNA 疫苗与突破性感染的延迟发作和较少的放射学异常有关

这项针对 2019 年冠状病毒病入境旅行者的回顾性研究表明，与信使 RNA 疫苗相比，接种信使 RNA 疫苗的个体到突破性感染的接种后间隔时间（中位数为 30.5 天）明显更长，入院时白细胞计数和乳酸脱氢酶水平更低，放射学异常更少那些接种了灭活病毒疫苗的人，矛盾的是他们的呼吸道病毒载量较低。