Ladhani SN, Ireland G, Baawuah F, Beckmann J, et al. Emergence of SARS-CoV-2 Alpha (B.1.1.7) variant, infection rates, antibody
seroconversion and seroprevalence rates in secondary school students and staff:
active prospective surveillance, December 2020 to March 2021, England. J Infect 2021 Aug 13. pii: S0163-4453(21)00401.
PMID: 34400220