In clinical practice, rheumatic encephalitis A+C is an inactivated vaccine and is usually used for the prevention of meningitis. Daily care during vaccination is required to reduce the possibility of side effects. The meningococcal A+C vaccine can prevent both group A and group C meningococcal infections and is usually indicated for children and adults over two weeks of age. Children under two years of age in meningitis endemic areas can also receive the inactivated A+C vaccine as an emergency to reduce the chance of meningitis. However, the inactivated influenza A+C vaccine should not be administered if they have symptoms such as fever or diarrhea, so as not to interfere with the observation of adverse reactions to the vaccine and to avoid aggravation of the disease. Some people may be allergic to the inactivated influenza A+C vaccine, which may cause redness, itching and peeling of the skin after vaccination. If an allergic reaction occurs, prompt anti-allergy treatment should be given and more warm water should be drunk to speed up the body’s metabolism and promote the discharge of allergens from the body, which will help reduce the impact of vaccination.