ABO blood groups are the most basic system of blood typing. This system divides blood into four groups – A, B, AB and O. The other main grouping used is the Rhesus (Rh) system, which is either ...

The Rh or Rhesus system is the second most common blood grouping system. It was first detected in 1940 by Landsteiner and Wiener. Rh typing is the test done to determine whether a person is Rh ...

Blood is categorised by the naturally occurring proteins and sugars on the surface of red blood cells. Jon Åslund/Flickr, CC BY Few discoveries have revolutionised the practice of medicine as much as ...

Scientists discovered a new group of blood types called the Er system. They also say that there are many ways to classify blood, the knowledge of which assists in treating blood incompatibility issues ...

Close up photo of female scientist holding a laboratory pipette and a blood sample tube for covid-19 in laboratory. She is wearing a protective suit, laboratory glasses, surgical mask and surgical ...