COVID-19 affects men and women differently. So why don't clinical trials report gender data?

COVID-19 doesn’t strike the sexes equally. Globally, for every 10 COVID-19 intensive care unit admissions among women, there are 18 for men; for every 10 women who die of COVID-19, 15 men die. In the United States, a gender gap is emerging in vaccination rates, with women ahead of men by 6 percentage points, according to the Centers for Disease Control and Prevention. And rare adverse effects from the AstraZeneca vaccine appear to strike women more frequently, whereas those from the Pfizer-BioNTech and Moderna vaccines more often affect young men.