Reinfection with new variants of SARS-CoV-2 after natural infection: a prospective observational cohort in 13 care homes in England.
Jeffery-Smith A, Rowland TAJ, Patel M, Whitaker H, Iyanger N, Williams SV, Giddings R, Thompson L, Zavala M, Aiano F, Ellis J, Lackenby A, Höschler K, Brown K, Ramsay ME, Gopal R, Chow JY, Ladhani SN, Zambon M