There are 35 blood groups in the world, but the two most common groups are ABO group and Rh group. These groups contain the eight blood types that dominate over 90% of the world's population.

This is also the case for the new blood group. "The work was difficult because the genetic cases are very rare," explained Tilley. Previous research found more than 99.9 percent of people have the ...

People with blood group A may be at higher risk of developing cardiovascular disease and certain types of cancer, such as gastric cancer. According to the study, people with type A blood have ...