coronavirus because it attacks the male sex hormone, a study suggests. Tests have shown infections drain about 30 percent of male hospital patients' testosterone levels, according to the study.Experts said this robbed them of their sex drives and increased their risk of falling seriously ill.Lead author Professor Selahittin Çayan said: "In our study, the mean total testosterone decreased, as the severity of the Covid-19 increased."Testosterone is associated with the immune system of respiratory organs, and low levels of testosterone might increase the risk of respiratory infections."Researchers in Turkey found 51 per cent of men in hospital after testing positive for Covid-19 developed hypogonadism – a condition where their bodies don't.