Ljung , R., Sundström , A., Grünewald , M., Backman , C., Feltelius , N., Gedeborg , R. and Zethelius , B. 2021. The profile of the COvid-19 VACcination register SAFEty study in Sweden (CoVacSafe-SE). Upsala Journal of Medical Sciences. 126, 1 (Dec. 2021). DOI:https://doi.org/10.48101/ujms.v126.8136.