Blood Supply Contaminated from FrankeVaxx

You can donate your own blood to be used in surgery. Obviously you have to do this before any emergency surgery. They do make you jump through hoops to do it, though. "Autologous donations are blood donations that individuals give for their own use – for example, before a surgery. Autologous donations require a Red Cross Special Collections Order form signed by your physician which serves as a prescription for this service."