The so-called incubation period: refers to the period from when a pathogen invades the human body to the earliest clinical symptoms appear. The length of the incubation period is different for different diseases, some diseases are as short as a few hours, and some are as long as several years. But the same infectious disease has a fixed incubation period.
The body mobilizes the role of the protective device to fight against the pathogenic factors. If the protective effect is sufficient, it will not show the symptoms of the disease afterwards, and it will not develop.
The concealment period refers to the time when the pathogenic stimulus invades or acts on the body, and ends when the body reacts or begins to show related symptoms corresponding to the disease. In infectious diseases, this stage is usually called the "incubation period", and the incubation period of various infectious diseases varies in length. For example, swine fever is 5-8 days, swine erysipelas is 3-5 days on average, anthrax is 1-5 days, and tetanus is 7-15 days. However, some diseases, such as severe mechanical trauma or electric shock, have almost no incubation period.
The "New Coronavirus Pneumonia Diagnosis and Treatment Plan (Trial Eighth Edition)" was issued. Among them, the source of infection and the route of transmission have been further improved, adding "infectious during the incubation period, and strong infectivity within 5 days after the onset", and "contact with virus-contaminated items can also cause infection." It also requires that “confirmed cases should be reported directly online within 2 hours after discovery”.
In addition, in terms of pathological changes, the lungs, spleen, hilar lymph nodes and bone marrow, heart and blood vessels, liver and gallbladder, kidney, brain tissue, esophagus, stomach and intestinal mucosa, testes and other organs and tissues are shown from gross anatomy and microscopy Described separately, and described the new coronavirus test results in the organization.