COVID-19 vaccine effectiveness against severe disease from SARS-CoV-2 Omicron BA.1 and BA. 2 subvariants - surveillance results from southern Sweden, December 2021 to March 2022

被引:39
作者
Bjork, Jonas [1 ,2 ]
Bonander, Carl [3 ]
Moghaddassi, Mahnaz [4 ]
Rasmussen, Magnus [5 ]
Malmqvist, Ulf [2 ]
Inghammar, Malin [5 ]
Kahn, Fredrik [5 ]
机构
[1] Skane Univ Hosp, Clin Studies Sweden, Lund, Sweden
[2] Lund Univ, Div Occupat & Environm Med, Lund, Sweden
[3] Univ Gothenburg, Sch Publ Hlth & Community Med, Inst Med, Gothenburg, Sweden
[4] Lund Univ, Dept Clin Sci Malmo, Social Med & Global Hlth, Malmo, Sweden
[5] Lund Univ, Skane Univ Hosp, Dept Clin Sci Lund, Sect Infect Med, Lund, Sweden
基金
瑞典研究理事会;
关键词
D O I
10.2807/1560-7917.ES.2022.27.18.2200322
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
We compared vaccine effectiveness against severe COVID-19 between December 2021 and March 2022 when Omicron BA.1 and BA.2 were the dominating SARS-CoV-2 variants in Scania county, Sweden. Effectiveness remained above 80% after the transition from BA.1 to BA.2 among people with at least three vaccine doses but the point estimate decreased markedly to 54% among those with only two doses. Protection from prior infection was also lower after the transition to BA. 2. Booster vaccination seems necessary to maintain sufficient protection.
引用
收藏
页码:8 / 13
页数:6
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