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Objective To investigate the effectiveness of primary covid-19 vaccination (first two doses and first booster dose within the recommended schedule) against post-covid-19 condition (PCC). Design Population based cohort study. Setting Swedish Covid-19 Investigation for Future Insights a Population Epidemiology Approach using Register Linkage (SCIFI-PEARL) project, a register based cohort study in Sweden. Participants All adults (≥18 years) with covid-19 first registered between 27 December 2020 and 9 February 2022 (n=589 722) in the two largest regions of Sweden. Individuals were followed from a first infection until death, emigration, vaccination, reinfection, a PCC diagnosis (ICD-10 diagnosis code U09.9), or end of follow-up (30 November 2022), whichever came first. Individuals who had received at least one dose of a covid-19 vaccine before infection were considered vaccinated. Main outcome measure The primary outcome was a clinical diagnosis of PCC. Vaccine effectiveness again

United statesVastra gotalands lanBristol myers squibbLisa lundberg morrisYiyi xuSusannah leachKing gustafMaria bygdellScilifelab knutS janssen johnsonHuiqi liFredrik nybergJari martikainenMagnus gisslAiliana santosaSwedish research council for environment