Karl Landsteiner blood group A nor of blood group B. Therefore, the immune systems of persons with blood group A, B or AB do not refuse the donation. Further, because persons with blood group AB do not form antibodies against either the antigens of blood group A or B, they can accept blood from persons with these blood groups, besides from persons with blood group O-negative. In today's blood transfusions only concentrates of red blood cells without serum are transmitted, which is of great importance in surgical practice. In 1930 Landsteiner was awarded the Nobel Prize in Physiology or Medicine in recognition
Nobel Prize award ceremony and banquet, which begins with the laureates arriving in Stockholm and normally ends with the Nobel banquet), but this is not mandatory. The laureate is only obliged to give the lecture within six months of receiving the prize. Some have happened even later. For example, US President Theodore Roosevelt received the Peace Prize in 1906 but gave his lecture in 1910, after his term in office. The lectures are organized by the same association which selected the laureates. It was announced on 30 May 2012 that the Nobel Foundation had awarded the contract for the production of the