Donations to top US provider have dropped to four-year summer low with less than a day’s supply of type O positive The American Red Cross has declared the second-ever national blood supply crisis after blood donations fell to a four-year summer low. On Monday, the 145-year-old non-profit said that as the United States’ largest single provider of blood products, it now has less than one-day national supply of type O positive blood – the most commonly transfused blood. Continue reading...