My Dd1 had ALL 3 years ago and needed a stem cell transplant.
We knew that her DNA would change and she would have the same DNA as her donor.
However, she’s just spent 8 days in hospital with an infection that turned into pleurisy and suspected sepsis. (Thanks to the selfish bastard who thought going to see an immuno compromised person whilst ill was nothing to worry about)
What we didn’t know was that her blood group has changed, she was O positive, she’s now O negative! The nurse showed us her records where it says “After X date (date of her transplant) ALL blood products MUST be O neg”.

Science and medicine is amazing.
Is there anything you’ve learned that blew your mind?