Investigation of COVID-19 infection in subjects with Klinefelter syndrome

Purpose COVID-19 has worse clinical outcomes in males compared with females and testosterone may determine gender differences. Hypogonadism and supernumerary X chromosome may have a role in the SARS-CoV-2 infection in Klinefelter syndrome (KS). Aim of the study was evaluating COVID-19 frequency and severity in KS. Methods Participants were invited to complete a retrospective self-administered questionnaire containing multiple choice and open-ended answers. Results COVID-19 was detected in 10% of the evaluated KS subjects; none was hospitalized. 44.4% of COVID-19 patients had one cohabitant-infected versus 3% of non-infected ( p