http://www.sciencemag.org/news/2020/09/hidden-immune-weakness-found-14-gravely-ill-covid-19-patients

A new study may help explain why men, like this patient in an Italian intensive care unit, are more likely than women to develop life-threatening COVID-19.

Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.