Re:
Blood and plasma are slightly different, plasma is the liquid component of blood and AB is the universal donor when it comes to plasma.
With blood O- is the universal donor and AB is the universal recipient.
The above is entirely correct. I am used to donating whole (AB) blood, which can help only about 4% of the population, but of course it frees up an O, A, or B unit for someone else. With plasma, it’s the other way around.
how much does blood cost these days? Last time I donated was for a friend’s friend having a surgery...and I gave at the hospital. I always wondered what the charge is for blood needed during surgery.