Mastered the world's people with blood type O

In each country, the blood type most commonly found are not always the same depending on the dominant ethnicity. But in general, worldwide group O + blood is most prevalent, while the most rare type AB.

Based rhesusnya factor, rhesus blood group has more positive than negative rhesus, with a ratio of 85 percent and 15 percent. This means that class A +, B +, AB + and O + are generally easier to find than the negative version.

While all types of known blood type, blood type O positive or Rh blood type O + is the most abundant, reaching 35-40 percent of the world's population. AB group AB rhesus negative or at best rare, only about 0.45 percent of the population.

Not known exactly why, but each blood group has its own dominance in certain areas, as quoted from the NCBI, Tuesday (05/08/2012) the following:

Blood Type O: American

Compared to other blood groups, the number of owners of the dominant O blood group in the world especially in America and Western Europe. Among the natives of Central America and South America, the ratio is very high close to 100 percent.

Blood Type A: Eastern and Central Europe

Countries such as Austria, Denmark, Norway and Switzerland have a ratio of the number of the owner of the blood group A is quite high, reaching 45-50 percent. Also in some places the population is not too big like the Blackfoot Indians in Montana, the ratio reached 80 percent.

Blood Type B: Asia

Ethnic China and India has the most blood group B, approximately 25 percent of the population. This most rare blood type found among Native Americans and Europeans, which is only about 10 percent.

Blood Type AB: East Asia

AB is the rarest blood type in the world possessed, but is most prevalent in Japan, Korea and some regions in China. In some places, the ratio of the amount no more than 10 percent of the population.