And donor blood must be kept in cold storage, where it has a 28-day shelf life. Given fear of contamination – and military interest in a more durable supply – research into synthetic alternatives has long been a medical priority.
当今血液供给——通常来自志愿捐献——可能被艾滋病和其他病原污染。献血者献的血必须冷藏，保质期为28天。出于污染担忧——以及更持久血源的军事利益——血液的合成替代品研究长期以来一直是医学的优先发展项目。