Reinfections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for coronavirus disease 2019 (COVID-19), were considered an uncommon event during the pre-omicron period of the pandemic [1,2]. However, during the omicron period [3], reinfections with SARS-CoV-2 became increasingly common [4]. Relatively early in the pandemic, risk factors such as age, obesity, and chronic illness played a significant role in the severity of COVID-19 [5]; however, their relevance to reinfections in the omicron period remains unknown.
