GPX3 and COVID-19: Namely, the risk of COVID-19 development was significantly decreased (crude OR = 0.62 95%CI: 0.41–0.95, p = 0.027) among carriers of the GPX3*TC + CC genotype compared to the carriers of the GPX3*TT genotype, although significant association was not confirmed by the adjusted analysis (OR = 0.67, 95%CI: 0.38–1.17, p = 0.157).