Health
Fifty years ago, we discovered people whose blood didn’t fit the accepted blood types. We just found out why
For more than a century, we’ve been classifying blood types based on two characteristics: blood antigens and Rh factor. Four blood groups based on antigens (O, A, B, AB) and two groups based on Rh factor (positive or negative) allow us to assign people’s blood to one of eight categories. Read more…
