Impact of age, ethnicity, sex and prior infection status on immunogenicity following a single dose of the BNT162b2 mRNA COVID-19 vaccine: real-world evidence from healthcare workers, Israel, December 2020 to January 2021 Abu Jabal, Kamal and Ben-Amram, Hila and Beiruti, Karine and Batheesh, Yunis and Sussan, Christian and Zarka, Salman and Edelstein, Michael, Eurosurveillance, 26, 2100096 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.6.2100096