I'm O-, CMV- and a mom. I like to think that my red cells might help some other mom's baby. And my platelet count is generally around 400,000. They can collect a double platelet from me quickly. I've had several close friends and family members who've needed platelets during surgery or because of cancer treatment. Ok, it sounds like I'm doing it to help others, but to be honest, it's probably because it makes me feel important.