Diagram showing the development of different blood cells from haematopoietic stem cell to mature cells. Haematopoiesis (from Greek Î±á¼·Î¼Î±, blood and ÏÎ¿Î¹Îµá¿Î½ to make; also hematopoiesis in American English; sometimes also haemopoiesis or hemopoiesis) is the formation of blood cellular components.iagram showing the development of different blood cells from haematopoietic stem cell to mature cells. Haematopoiesis (from Greek Î±á¼·Î¼Î±, blood and ÏÎ¿Î¹Îµá¿Î½ to make; also hematopoiesis in American English; sometimes also haemopoiesis or hemopoiesis) is the formation of blood cellular components.
HIV/AIDS. HIV/AIDS damages cells of the immune system, making it difficult to fight infections and certain cancers. Women can pass the virus to their fetus during pregnancy; transmission also can occur during labor and giving birth or through breastfeeding.
1 Your risk of getting HIV from a blood transfusion is lower than your risk of getting killed by lightning. 2  Only about 1 in 2 million donations might carry HIV and transmit HIV if given to a patient. 3  Hepatitis B and C. The risk of having a donation that carries hepatitis B is about 1 in 205,000.