This antigen is present in 85% of people (those with an Rh-positive blood group). Similarly, its absence characterizes the Rh ...

It's a bit simplistic, but you can think of the Rh factor as a protein that is either present (positive) or absent (negative) on red blood cells. Exact percentages vary with race, but most people ...

Regina Hall and her Rh Negative production company have struck ... we knew she had something special that would resonate with ...