Blood supply sees 30-year low; only 4 percent of eligible blood donors give Wed, 08/11/2021 - 12:00am Blood is essential and can’t be manufactured. If it could be, that would be necessary right now. Only 4 percent ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about Blood supply sees 30-year low; only 4 percent of eligible blood donors give