Influenza vaccination instructions
1. Vaccine components and characteristics
Influenza (influenza) vaccine is an inactivated vaccine. Since influenza virus undergoes small mutations almost every year and major mutations occur every decade. World Health Organization speculates possible epidemic strains every year based on global epidemic detection. It is recommended that the components of the vaccine are trivalent, and the ingredients include two types: type A and type B virus strains.
2. Safety and side effects
Influenza vaccine is a very safe inactivated vaccine. After vaccination, a few people may have mild reactions of pain, redness, swelling, fever, and burnout at the injection site, but generally recover within one or two days after vaccination, and the serious side effects are about 15~20%.
3. Protective effect
The protective effect of the vaccine depends on whether the vaccine strain used in that year matches the actual epidemic virus strain type. Otherwise, the protective power of the vaccine will decrease with the increase in the difference in the virus type. According to foreign literature, the protective power of influenza vaccine varies from ethnic group to different ethnic groups, with an average of 30~80%, and 70~90% protection for healthy adults, and its immune effect may only last for 4~6 months.
4. Vaccination time
Since the virus types that are prevalent in influenza are not necessarily the same every year, vaccination is required once a year. Experts recommend that the vaccine be given after mid-September, but vaccination should be completed before the end of November to prevent infection during the influenza epidemic season.
5. Vaccination Contraindications
People who are allergic to protein (egg-protein) or other components of vaccines, who are under six months old, are not suitable for vaccination after being evaluated by a physician. Vaccination should be postponed for fever or acute diseases. Whether pregnant people are vaccinated will be evaluated by a doctor.
6. Precautions after vaccination
If you have a fever after 48 hours of vaccination, the doctor should be reminded that there may be another infection or other fever cause, but the possibility of influenza infection cannot be ruled out.
