However, while the number of new AIDS cases among male homosexuals and drug users has begun to level off, the number of new AIDS cases among heterosexuals, particularly women and young adults and adolescents of both sexes, continues to rise. In the early 1980s many people with blood disorders such as hemophilia, who require repeated transfusion of blood products, became infected with HIV before blood banks began testing donated blood for HIV antibody. Genetically engineered versions of blood products are now available to prevent HIV transmission, and a test to screen for the virus now ensures a safe blood supply for recipients of blood transfusions. AIDS is not spread through casual contact, such as working next to someone, sharing a towel or using the same toilet seat or drinking glass, or by hugging or shaking hands. The purpose of blood is to carry oxygen which the body and brain requires for us to live.
Brain cells die very quickly without healthy, oxygenated blood.
Sudden or clinical quickly progresses to brain or biological death which is final. There is no reversal. During this period brain cells start to die. After approximately 10 minutes the brain is dead. This death is final.