The battle between the human body and viruses

The human body mainly relies on the immune system to fight against viruses. Firstly, the skin and mucous membranes form biological and mechanical barriers, blocking virus invasion and disrupting their structure. If the virus breaks through, innate immune cells such as macrophages and natural killer cells will recognize and attack virus-infected cells. Meanwhile, cytokines such as interferon and interleukin regulate immune responses and inhibit viral replication. Adaptive immunity further recognizes and eliminates viruses or virus-infected cells through antibodies produced by B cells and immune responses mediated by T cells. In addition, using medical methods such as vaccines and drugs to build a new line of defense for the human body. This series of mechanisms together constitute the human body's multiple lines of defense against viruses.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The way viruses enter the human body and the symptoms they produce. ① Norovirus: mainly enters the body through the oral cavity, infecting the stomach and intestines, causing symptoms such as vomiting and diarrhea. ② Dengue virus: mainly enters the bloodstream through the bite of Aedes mosquitoes on the skin, causing nausea, vomiting, high fever, and muscle pain. ③ Hand, foot, and mouth disease: Enteroviruses enter the body through skin contact or through the digestive and respiratory tracts, causing fever, sore throat, rash, and herpes. ④ Influenza virus: mainly enters the body through the respiratory tract, infects the lungs, and causes symptoms such as high fever, sore throat, and muscle soreness. ⑤ Human papillomavirus (HPV): It is mainly transmitted through the reproductive system and enters the cells of the skin and mucous membranes. It has a latent period and can cause cancer.