Antibodies to SARS-CoV-2 protect against re-infection during outbreaks in care homes, September and October 2020 Jeffery-Smith, Anna and Iyanger, Nalini and Williams, Sarah V and Chow, J Yimmy and Aiano, Felicity and Hoschler, Katja and Lackenby, Angie and Ellis, Joanna and Platt, Steven and Miah, Shahjahan and Brown, Kevin and Amirthalingam, Gayatri and Patel, Monika and Ramsay, Mary E and Gopal, Robin and Charlett, Andre and Ladhani, Shamez N and Zambon, Maria, Eurosurveillance, 26, 2100092 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.5.2100092