Solna
Sweden
European Centre for Disease Prevention and Control
COVID-19, vaccine effectiveness, multicentre study, test-negative design, Europe, SARS-CoV-2
COVID-19, Vaccine effectiveness, Test-negative design, Self-test, Bias, Directed acyclic graph, Simulation
COVID-19, vaccine effectiveness, SARS-CoV-2, Europe
COVID-19, SARS-CoV-2, Vaccine effectiveness, Primary care, Case-control study, Test-negative design, Multi-country study
COVID-19 Vaccine Effectiveness Among Older Adults in 2025/26
COVID-19, SARS-CoV-2, Vaccine effectiveness, Europe