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(A) Stacked diagram of patient populations with different ages, arranged continent-wise for both period-I (March 2020–February 2021) and period-II (March 2021–first week of April 2021). (B) For both periods, the percentage of COVID-19 patients grouped according to their age was plotted in relation to infection with each specific clade (G, GH, GR, GRY and GV).
