Risk of BA.5 Infection among Persons Exposed to Previous SARS-CoV-2 Variants
To the Editor: In recent months, omicron (B.1.1.529) became the dominant variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), displaying some degree of immune evasion.1 The initial omicron subvariants, BA.1 and BA.2,…