According to the site rhesusnegative.net, the most common groups in the United States are O and A (44% and 42%), while groups B.
AB only represent 10% and 4% of the population respectively.
The indigenous people of South America are overwhelmingly group O, which is particularly visible when looking at the figures in Peru (71.4% of individuals).
As for blood group B, it is very common in India (40%) and generally quite common in South Asian countries, such as Vietnam for example (31%).
