At what event does the Carrie get drenched with pig's blood in the Steven King novel?
She gets drenched at her prom. :)
If you're talking about a full blood transfusion for medical purposes, probably, assuming the event officials are notified prior to the event and give their consent. On the other hand, if you're talking about blood doping, the infusion of additional red blood cells which carry oxygen to the muscles, then no, this was outlawed for athletes in 1986.
Drums, girls, and dangerous pie is about Steven Alpher surviving his life with his younger brother suddenly diagnosed with lukemia or blood cancer. He has to learn to adapt to his new life with his parents rushing around being concerned for his younger brother's, Jeffrey's, safety. In order to escape parts of his life, Steven takes the drums more seriously and hopes to participate in a local school event.