Zhonghong.com Shandong, September 16, Recently, the weather has gradually become cooler and the temperature difference has changed significantly. It is the peak season for respiratory infectious diseases such as influenza . The flu virus spreads rapidly and can cause seasonal epidemics every year. Outbreaks are prone to occur in places where people gather, such as schools, childcare institutions and nursing homes, and people are generally susceptible to them. Getting influenza vaccinated every year is an effective means to prevent influenza and can significantly reduce the risk of influenza and serious complications in vaccinated people.
How many influenza vaccines have been approved for marketing in my country?
The influenza vaccines approved for marketing in my country include trivalent inactivated vaccine (IIV3), trivalent live attenuated vaccine (LAIV3) and tetravalent inactivated vaccine (IIV4). For people who can receive different types of vaccine products from different manufacturers, they can voluntarily receive any influenza vaccine.
Influenza vaccine is safe and egg allergy is not a contraindication.
Influenza vaccine originating from chicken embryos contains a small amount of egg protein. People who are allergic to eggs have a theoretical risk of causing an allergic reaction after receiving the influenza vaccine. " Pharmacopoeia of the People's Republic of China" (2015 and 2020 editions) strictly restricts the content of ovalbumin inactivated and lysed vaccines for influenza viruses, and does not use egg allergies as a taboo for vaccination. The measurement of the oval protein content in commonly used influenza vaccines in my country shows that the highest content is also much lower than that of the pharmacopoeia. The U.S. Advisory Committee on Vaccine Implementation (ACIP) has recommended that people allergic to eggs also receive influenza vaccines. Therefore, it is not recommended to use egg allergy as a taboo for influenza vaccination.
What should I do if the child is afraid of getting an injection? Nasal spraying vaccine will help.
In 2020, China approved the market of a freeze-dried nasal spray live attenuated vaccine. It has better immune response in young children and school-age children than adults and has good immunogenicity. As a "non-mainstream" vaccination method, nasal jet influenza vaccine uses mucosal vaccination technology, allowing the vaccine to be absorbed into the body through the nasal mucosa, thereby producing mucosal immunity , humoral immunity and cellular immunity, achieving the purpose of preventing influenza. During vaccination, spray it in each of the two nostrils to complete the vaccination. At present, the applicable age of domestic nasal jet influenza vaccine is 3-17 years old. If children of this age are very afraid of injections and are very resistant, you might as well try to get nasal jet influenza vaccine.
Do I need to get the flu vaccine every year?
Yes. On the one hand, the flu virus mutates very quickly. WHO monitors the mutation of global influenza viruses through global influenza monitoring and corresponding systems. In order to match the constantly mutated influenza virus, the influenza vaccine components will be adjusted according to the strains that are prevalent every year. On the other hand, the protective effect of inactivated influenza vaccine on antigen-like strains can only be maintained for 6 to 8 months. After one year of vaccination, the level of serum antibody of is significantly reduced. Therefore, only by getting influenza vaccine every year can you obtain continuous protection.
Edited by: Cao Tao
Reviewed by: Li Yan
