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Sex and age distribution of S gene target failure (SGTF) in England. (A) Sex-age pyramid of non-SGTF group (left) and SGTF group (right) from December 1, 2020 to January 11, 2021 (extracted from Chand et al. [7]) (brown, female; green, male). (B) Weekly number and proportion of SGTF cases tested in TaqPath Labs in England by age groups (extracted from Chand et al. [7]).
