https://www.news-medical.net/news/20...in-Sweden.aspx
Large study of COVID vaccine side effects in Sweden
Recently, researchers from Sweden reported population-based, age- and sex-specific background incidence rates of conditions that represent potential COVID-19 vaccine adverse events of special interest (AESI) in the general Swedish population with the help of registered data. This study is published on the medRxiv* preprint server.
The following outcomes were selected and defined by the authors based on information from regulatory authorities, previous studies, large-scale adverse events initiatives: febrile seizure, aseptic meningitis, Kawasaki syndrome, arthritis, post-infectious arthritis, myocarditis, myocardial infarction, ARDS, stroke, hemorrhagic stroke, ischemic stroke, venous thromboembolism, kidney failure, pulmonary embolism, liver failure, `erythema multiforme, autoimmune thyroiditis, disseminated intravascular coagulation, and appendicitis.
They determined incidence rates stratified by age, sex, and time period and classified them according to the following Council of International Organizations of Medical Sciences (CIOMS) categories: very common, common, uncommon, rare, or very rare.
A total of 972,723 subjects representing the Swedish national population on 1 Jan 2020 were included in the study. They found that the incidence rates of AESI varied significantly by age and, in some cases, sex. Many common AESIs increased, as expected, with age, while some AESIs such as appendicitis, autoimmune thyroiditis, aseptic meningitis, Kawasaki syndrome and MISC were more common among young people. On the other hand, other AESIs such as myocarditis and erythema multiforme showed a flatter age pattern.