| Answer | Crossword Clue |
|---|---|
| TYPEO | Like the blood of a universal donor |
| TYPEO | Blood group known as the universal donor |
| ONEGATIVE | Blood type historically considered the universal donor |
| ONEG | Blood type of a universal donor, briefly |
| RHNEGATIVE | Like the blood type of "universal donors" |
| TYPEO | Like a universal donor |
| TYPEO | Like a universal donor's blood |
