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.
About 90 percent of those were infected with the virus during pregnancy or birth. HIV transmission from mother to child during pregnancy, labor, delivery or breastfeeding is called perinatal transmission. Perinatal HIV transmission is the most common way children are infected with HIV. person may be âHIV positiveâ but not have AIDS. An HIV infected person may not develop AIDS for 10 years or longer. A person who is HIV positive can transmit the virus to others when infected blood, semen or vaginal fluids come in contact with broken skin or mucus membranes.