#Protection against symptomatic #infection with #delta (#B16172) and #omicron (#B11529) #BA1 and #BA2 #SARS-CoV-2 #variants after previous #infection and #vaccination in #adolescents in #England, August, 2021–March, 2022: a national, observational, test-negative, case-control study, https://doi.org/10.1016/S1473-3099(22)00729-0
#protection #infection #delta #b16172 #omicron #b11529 #ba1 #ba2 #sars #variants #vaccination #adolescents #england