O negative blood group is definitely rare, about 5 to 7% people of this world have the blood type; but AB negative group is rarest, not more than 1% people have the blood type in the world.
https://onlinenursingunits.com/wp-content/uploads/2021/07/unitlogo-300x60.png00dennohhttps://onlinenursingunits.com/wp-content/uploads/2021/07/unitlogo-300x60.pngdennoh2021-08-04 11:39:522021-08-04 11:39:52Is O Negative a rare blood type?