Siller Anita, Seekircher Lisa, Astl Manfred, Tschiderer Lena, Wachter Gregor A, Penz Julia, Pfeifer Bernhard, Huber Andreas, Gaber Manfred, Schennach Harald, Willeit Peter
Central Institute for Blood Transfusion and Immunology, University Hospital Innsbruck, Tirol Kliniken GmbH, 6020 Innsbruck, Austria.
Institute of Health Economics, Medical University of Innsbruck, 6020 Innsbruck, Austria.
Vaccines (Basel). 2024 Mar 8;12(3):284. doi: 10.3390/vaccines12030284.
To provide updated estimates on SARS-CoV-2 antibody seroprevalence and average antibody titres for Central Europe.
In repeat cross-sectional investigations (1 May 2022 to 9 March 2023) involving 28,768 blood donors in the Federal State of Tyrol, Austria (participation rate: 87.0%), we measured Spike receptor-binding domain (RBD) and Nucleocapsid IgG antibodies (37,065 and 12,645 samples), and estimated monthly seroprevalences and geometric mean titres.
Median age of participants was 45.4 years (range 18-70); 43.2% were female. Spike RBD IgG antibody seroprevalence was 96.3% (95% CI: 95.6-96.9%) in May 2022, 97.4% (96.7-98.0%) in December 2022, and 97.9% (96.4-98.8%) in March 2023. Among seropositive participants, geometric mean titres increased from 1400 BAU/mL (95% CI: 1333-1471) in May 2022 to 1821 BAU/mL (1717-1932) in December 2022, and dropped to 1559 BAU/mL (1405-1729) by March 2023. Furthermore, titres differed markedly by vaccination status and history of infection, with being the highest in participants with booster vaccination and prior infection. In autumn 2022, Nucleocapsid IgG antibody seroprevalence ranged from 36.5% (35.0-38.1) in September to 39.2% (37.2-41.2) in December 2022.
Seroprevalence of SARS-CoV-2 antibodies in blood donors from Tyrol, Austria, was remarkably stable from May 2022 to March 2023. In contrast, average Spike RBD IgG antibody titres peaked in December 2022.
提供中欧地区严重急性呼吸综合征冠状病毒2(SARS-CoV-2)抗体血清阳性率和平均抗体滴度的最新估计值。
在奥地利蒂罗尔州进行的重复横断面调查(2022年5月1日至2023年3月9日)中,纳入了28768名献血者(参与率:87.0%),我们检测了刺突蛋白受体结合域(RBD)和核衣壳IgG抗体(分别检测了37065份和12645份样本),并估计了每月的血清阳性率和几何平均滴度。
参与者的年龄中位数为45.4岁(范围18 - 70岁);43.2%为女性。2022年5月,刺突RBD IgG抗体血清阳性率为96.3%(95%置信区间:95.6 - 96.9%),2022年12月为97.4%(96.7 - 98.0%),2023年3月为97.9%(96.4 - 98.8%)。在血清阳性参与者中,几何平均滴度从2022年5月的1400 BAU/mL(95%置信区间:1333 - 1471)增加到2022年12月的1821 BAU/mL(1717 - 1932),到2023年3月降至1559 BAU/mL(1405 - 1729)。此外,滴度因疫苗接种状况和感染史而有显著差异,在接种加强针和有既往感染史的参与者中最高。2022年秋季,核衣壳IgG抗体血清阳性率在9月为36.5%(35.0 - 38.1),到2022年12月为39.2%(37.2 - 41.2)。
2022年5月至2023年3月,奥地利蒂罗尔州献血者中SARS-CoV-2抗体的血清阳性率显著稳定。相比之下,刺突RBD IgG抗体平均滴度在2022年12月达到峰值。