Risk factors for Omicron reinfections among previously infected frontline workers in the United States

Researchers examined a prospective cohort of frontline workers in the United States (US) previously infected with SARS-CoV-2. They attempted to identify risk factors that made this highly vulnerable population prone to reinfection by SARS-CoV-2 new variant of concern (VOC), Omicron, known for its high immune evading potential.