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I have gone through your query and can understand your concern...
Transfusion of blood is delayed in a person with low
platelet count till it becomes a emergency situation. This is due to the fact that
blood transfusion or transfusion of blood components contains considerable risk. The risk of following problems
1 Bloodborne infections- Blood banks test blood for infections to reduce transfusion-related infections. But it can take weeks or months after a infection is spread, to be positive in blood. During this time a infection can easily spread to blood receiving.
2 Iron overload- If you receive multiple blood transfusions, you may end up with too much iron in your blood.
3.Acute immune hemolytic reaction can occur which can be very serious
4 Transfusion-associated
graft-versus-host disease is a very rare condition in which transfused white blood cells attack the recipient’s
bone marrow. This disease is usually fatal
So taking a safe measure blood transfusion is delayed till it becomes absolutely necessary.
Hope this information helps