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.
Vertical transmission of HIV can occur in utero, during labor or after delivery. It is estimated that in 65 percent of HIV-infected infants, transmission occurred during labor.8 Multiple factors increase the risk of vertical transmission of HIV (Table 1).9. HIV infection in infants appears to have two forms.