At-home sampling to meet geographical challenges for serological assessment of SARS-CoV-2 exposure in a rural region of northern Sweden, March to May 2021: a retrospective cohort study Byström, Julia Wigren and Vikström, Linnea and Rosendal, Ebba and Gröning, Remigius and Gwon, Yong-Dae and Nilsson, Emma and Sharma, Atin and Espaillat, Akbar and Hanke, Leo and McInerney, Gerald and Puhar, Andrea and Cava, Felipe and Karlsson Hedestam, Gunilla B and Thunberg, Therese and Monsen, Tor and Elgh, Fredrik and Evander, Magnus and Johansson, Anders F and Överby, Anna K and Ahlm, Clas and Normark, Johan and Forsell, Mattias NE, Eurosurveillance, 28, 2200432 (2023), https://doi.org/10.2807/1560-7917.ES.2023.28.13.2200432