The third shot is generally the third dose of the new vaccine, and those who should not take the third shot include pregnant women, people with fever, people with severe allergic reactions after the second shot, and people with neurological disorders, etc. There are not only five types of people who should not take the third shot. 1. Pregnant women: Pregnant women are not recommended to receive the third vaccination because they are worried that the ingredients of the vaccine may affect the development of the fetus and the health of the pregnant woman. As the fetus is developing and its functions are not perfect, the ingredients of the vaccine may enter the fetus through the placental barrier, which may lead to adverse effects such as growth restriction or deformity of the fetus. 2. People with fever: you can’t take the vaccine when you have fever, you need to be treated and stop taking medication for more than 4 days before you can take the third injection. Because after the third injection, some patients may have fever and other adverse reactions. If the fever is caused by illness, it is not certain whether it is caused by the vaccine or the illness itself. 3. People with severe allergic reactions after the second vaccination: If a severe allergic reaction occurs after the first two vaccinations, the third vaccination cannot be continued. 4. People with neurological disorders: Since the new crown vaccine may have certain side effects on the human nervous system, patients with epilepsy, Guillain-Barre syndrome and other neurological disorders are generally not allowed to take the third shot of the new crown vaccine.