Hello and welcome.
Stick around here, I'm sure you will get lots of support and make lots of new friends.
I hope everything goes ok with your dad's operation, I'm sure you must be very worried, its frustrating when people wont take medical advice for such stupid reasons.
My mum had a couple of operations a few years ago, the surgeon actually told my brother that if she refused a blood transfusion she would probably die, but the stubborn thing wouldn't listen, fortunately she was very lucky and is still here today (Jehovah looked after her apparentley).
Anyway, welcome again.