Viruses typically survive outdoors for a few minutes to several days, depending on the type of virus and the environment, among other factors. Viruses usually need to be in the environment of human body fluids to survive and multiply. After leaving the human environment, in the case of HIV, for example, they usually die within a few hours at room temperature. In the case of the new coronavirus, it can survive for a maximum of 3 to 5 days in a humid environment, while the hepatitis B virus can survive for about 7 days in a suitable environment. In addition, for some enteroviruses, they can even survive for more than half a year in an aquatic environment, and most of them can survive for a longer period of time in a frozen environment. If viruses are suspected to be present in the surrounding environment, they can be dealt with by ventilating the room diligently and spraying disinfectants, etc. If symptoms of viral infection appear, seek medical attention immediately to avoid delaying the condition.