claim: sex differences in immune responses to sars-cov-2 that underlie disease outcomes
evidence_1: in this study, we examined sex differences in viral loads, sars-cov-2-specific antibody titers, plasma cytokines, as well as blood cell phenotyping in covid-19 patients.", "conversely, higher innate immune cytokines in female patients associated with worse disease progression, but not in male patients.", "in contrast, female patients mounted significantly more robust t cell activation than male patients during sars-cov-2 infection, which was sustained in old age.")