certain blood groups
Maybe worth having blood drawn once and then reassessing based on personal blood, especially in light of exceptional cases like:
https://​​en.wikipedia.org/​​wiki/​​James_Harrison_(blood_donor)
Maybe worth having blood drawn once and then reassessing based on personal blood, especially in light of exceptional cases like:
https://​​en.wikipedia.org/​​wiki/​​James_Harrison_(blood_donor)