我国未有官方公布每年输血患者人数。
给你一组美国红会的官方数据参考:
Every two seconds someone in the U.S. needs blood.
Approximately 36,000 units of red blood cells are needed every day in the U.S.
Nearly 7,000 units of platelets and 10,000 units of plasma are needed daily in the U.S.
Nearly 21 million blood components are transfused each year in the U.S.
The average red blood cell transfusion is approximately 3 pints.
http://www.redcrossblood.org/learn-about-blood/blood-facts-and-statistics