Inactivated vaccines are artificially inactivated so that the pathogen is not pathogenic but retains antigenicity and produces antibodies through stimulation of the body, with relatively high safety, but usually require multiple vaccinations, with the specific number of vaccinations to be decided according to different types of inactivated vaccines. The vaccine is usually given twice, and children who have not been vaccinated can be vaccinated within 14 years of age, usually at an interval of 6 months between vaccinations. Some children are prone to low fever, local pain, redness, swelling, hard nodules and other reactions after vaccination, which do not require special treatment and can usually be relieved within 72 hours; if the symptoms worsen, seek medical attention promptly; 2. Inactivated hepatitis B vaccine: Inactivated hepatitis B vaccine usually requires three injections, the first one on the same day, the second one a month later, and the third one 6 months later. Some patients are prone to local redness, swelling, itching and pain after injection, and serious cases are prone to gastrointestinal reactions such as nausea, abdominal pain, diarrhea, etc., which can usually be relieved within 24 hours, and if the body temperature reaches 39℃ or above and the symptoms do not improve, specific treatment can be carried out according to medical advice; 3. Inactivated New Coronavirus Vaccine: It can prevent new coronavirus, and people over 12 years old can be vaccinated for a total of 2 times, with an interval of at least The interval between the two vaccinations is at least 14-28 days. Some people are prone to allergic reactions, headache, nausea, anorexia, fever and other symptoms after successful vaccination, which are normal adverse reactions and can subside on their own, but if the condition is serious, they can seek medical help, and the vaccination can be suspended for pregnant women or people with acute illnesses; 4. Inactivated influenza vaccine: commonly used to prevent influenza virus, people aged 3 years and above can be vaccinated, if they have not been vaccinated against influenza, they can be vaccinated twice, and the interval between vaccinations is at least 4 weeks. The interval is at least 4 weeks, and for those who have already been vaccinated, only one vaccination can be given, because the virus of influenza varies from year to year, and one vaccination is needed every year. After successful vaccination, fever, chills, muscle pain, fatigue and swelling of the vaccination site may occur, usually 1-2 days can be self-relieved; 5. Rabies vaccine: commonly used to prevent rabies virus, generally people over 2 years of age can be vaccinated, and the number of vaccines should be determined according to individual circumstances. Generally, adverse reactions are small and local redness, swelling and pain at the vaccination site can subside within 24-48 hours; 6. Hand, foot and mouth disease vaccine: Hand, foot and mouth disease vaccine is also called inactivated enterovirus 71 vaccine, which is used to prevent hand, foot and mouth disease caused by EV71 infection. doses, with an interval of 1 month usually required after the first dose. Inactivated vaccines also include inactivated polio vaccine and epidemic hemorrhagic fever vaccine, among others. The number of vaccinations varies depending on the type of inactivated vaccine, but due to the nature of inactivation, multiple vaccinations are usually required, and attention should be paid to the time of the next vaccination after vaccination to avoid forgetting. After vaccination, you should pay attention to a light diet, avoid spicy and stimulating foods, and avoid drinking alcohol, strong tea, coffee, etc. Pay attention to rest and seek medical attention if you feel unwell.