Asymptomatic or Symptomatic SARS-CoV-2 Infection Plus Vaccination Confers Increased Adaptive Immunity to Variants of Concern

In this cross-sectional study, researchers examined serological and cell-mediated immune memory to SARS-CoV-2 variants, including Omicron, among a cohort of 18-21-year-old Marines with a history of either asymptomatic or mild SARS-CoV-2 infection 6 to 14 months earlier.