The Red Cross is reporting that blood donation numbers are down right now. That often happens after the holidays, but today, these stats are setting off alarms. The number of people donating blood is at the lowest level in twenty years, falling by 40%. The Red Cross is struggling to meet demand. The pandemic kept many people away. But the world is changing. And attitudes are, too. It’s the second time they have signaled the alarm in the last four months. And the medical community is distraught…