The widely circulated reports of HIV infection through blood in Henan Province are mainly due to the fact that some illegal blood collection points, in order to make huge profits, use outdated technical means to collect blood and plasma illegally, and reuse blood collection devices, medical equipment, etc., which led to the infection of some blood donors with the HIV virus. Upon investigation, the plasma collected locally is stored in plastic bags after the blood of the donors is drawn out. As it collects as much as 800 milliliters of blood per bag, the result is that the blood of many people is mixed in a blood bag and separated into two major parts, namely plasma and blood cells, in large centrifuges. The separated plasma is then collected, and the rest of the blood cells are mixed with saline and then transfused into the donors' bodies. Since such a process involves multiple people *** using blood collection needles and catheters, and *** using poorly sterilized instruments, if one of them is infected with HIV or other viruses, he or she will subsequently infect other blood donors.