. Anyone who has been exposed to basic biological studies knows that every living creature has its own environment to adapt to. Although viruses cannot be called creatures, they also need a certain living environment to survive. Therefore, the survival time of HIV in vitro also depends on environmental conditions. In addition, the amount of HIV in body fluids is also one of the necessary conditions for determining the length of HIV survival outside the body.  . . Under normal circumstances, the general population rarely comes into contact with HIV outside the body, and scientific researchers in the general laboratory have more exposure, so the following is mainly based on the various in vitro survival situations in the laboratory. Other situations are supplemented by explanations.  . .In the laboratory, under the premise that the concentration of HIV is extremely high, HIV can still survive in dried body fluids for 15 days. The specific explanation of survival here is: still in these 15 days It is infectious. Of course, HIV is a very fragile virus, so its 15-day survival conditions are not only high concentrations, but also suitable temperature and humidity environments. If you leave the laboratory environment, HIV is actually very easy to eliminate. High temperature, strong acid, weak alkali, and medical alcohol can all eliminate it. Therefore, the possibility of contracting AIDS when handling body fluids is extremely small. However, it is important to note that HIV is known to invade the human body from blood, human wounds, mucous membranes, etc. Therefore, when handling blood, semen, and vaginal secretions, be careful not to let them touch these areas.  . .Whether in daily life or in the laboratory, when dealing with AIDS-related blood, once the blood spills out of the container, it must be cleaned immediately, and high temperature, strong acid, weak alkali, medical alcohol, etc. The substance or way to eliminate HIV. Of course, avoiding direct contact with body fluids or blood can ensure safety to a greater extent.  . .A dry environment can reduce the drying of body fluids (containing HIV), thereby greatly reducing the activity of HIV. Scientific research has found that drying can reduce the activity of HIV to the maximum extent of 90% or even Ninety-nine, so even if the air itself cannot kill HIV, HIV exposed to the air will be “killed” within a few hours. This also proves that the survival time of HIV in vitro is not very long. So everyone can rest assured.  . . Regardless of whether it is the laboratory personnel or the general population, one thing that has to be understood is that HIV can still survive in the residual blood of used injection needles even if it is not in the appropriate environment of the laboratory. A few days. The fact pointed out in the previous paragraph is that under dry conditions, the activity of HIV can be greatly reduced. However, we should pay attention to the fact that the blood remaining in the injection needle is not easy to dry compared to the outside world. Once there is a sharing of injection needles, the HIV remaining in the blood follows the needles that can directly enter the blood, causing infection. Therefore, repeated use of injection needles is strictly prohibited.