When in emergency, do whatever is necessary for survival.
As @Epiphany correctly wrote, chances of Yehuborim donating blood is extremely unlikely. You can also do a basic cleaning and protection for your husband.
I think. Blood is a sacred element of life given to us by Satan himself. No one just gives it to another person. Good intention is the most important and can certainly help in a difficult moment. I've already had my first time (donating blood). It doesn't cost anything, and I believe that with small gestures we change the world for the better.
i dont know how its happening in your country but here we can see who gave this blood. even there is some groups on social media or whatsapp, we may ask for who is available for blood. you may search it about your country
When in emergency, do whatever is necessary for survival.
As @Epiphany correctly wrote, chances of Yehuborim donating blood is extremely unlikely. You can also do a basic cleaning and protection for your husband.
My blood is universal I can donate to everyone but only receive from the same kind, maybe his organism would accept but I need it, is full of crazy bloody cells might not be the best option for your husband anyway, I wish him the best.