Type O positive is the most commonly transfused blood type, because can safely be used to treat over 80 percent of the population. The Red Cross declared its first-ever national blood crisis in January 2022, triggered by a previous low in donor turnout due to ongoing COVID-19 surge disruptions. The risks of an extremely limited blood supply are considerable. The organization says that just “three more donors at each blood drive this summer can end this crisis and stabilize the blood supply.” If you or a loved one wants to donate blood, this site run by the Red Cross can help find a blood drive nearby.