Blood Types and the Population. O positive is the most common blood type. Not all ethnic groups have the same mix of these blood types. Hispanic people, for example, have a relatively high number of Oâs, while Asian people have a relatively high number of Bâs.The mix of the different blood types in the U.S. population is:n addition to the A and B antigens, there is a third antigen called the Rh factor, which can be either present (+) or absent (â). In general, Rh negative blood is given to Rh-negative patients, and Rh positive blood or Rh negative blood may be given to Rh positive patients.
Medical Definition of LENTIGO. 1. : a small melanotic spot in the skin in which the formation of pigment is unrelated to exposure to sunlight and which is potentially malignant; especially: nevusâcompare freckle. 2. : freckle.
1. lentigo-a small brownish spot (of the pigment melanin) on the skin. freckle. cutis, skin, tegument-a natural protective body covering and site of the sense of touch; your skin is the largest organ of your body.