There will be blood
https://www.science.org/content/article/ultimate-blood-substitute-us-military-betting-46-million
In the 19th century, Theodore Gaillard Thomas was a renowned gynecologist who advocated for using milk as a blood substitute. Despite initial trials, this method was soon replaced by saline solutions. However, the quest for effective blood substitutes continues. Today, ErythroMer, developed by Allan Doctor at the University of Maryland, offers a promising alternative. This artificial blood, made from recycled human hemoglobin, can be used for any blood type and is easily reconstituted from a freeze-dried powder. It holds potential for emergency situations where fresh blood is unavailable, like battlefields and rural areas.