I'm a 12 percenter then... Donated four or five time a year for ages, then went and had myself a little infarction. Been back twice to check and double check but I'm no longer welcome for cookies and juice.
For the folk with needle issues, try this for size. Back in the day, we had a thing called National Service. Some of us were called up to SAMS (the medics) and a handful of those medics were chosen to be operational. Those unlucky few spent six months training, three doing weapons and tactics and three doing medical phase. Generally that meant nights at Hillbrow or Baragwanath hospital treating or assisting with casualties.
Doctors wouldn't let you just jump in 'tho, for drips and such you needed practice... So, on our first night at Hillbrow, our platoon were shown how drip needles worked, and just as soon as we had watched one being administered, our Corporal volunteered me to be the practice pin cushion for fifteen or so of my mates.
Fun fact: If your going to be trying multiple drips, they can't all go in the same place or vein. You start with the veins in the back of your hand and then move on up the forearm... Both arms in this case.
I suppose it's like jumping out of a plane if you have a fear of heights, but short of being impaled on an exhaust sized pipe, needles... Meh.