At a recent press conference held by the National Health Commission, the relevant person in charge of the Chinese Center for Disease Control and Prevention suggested getting vaccinated against influenza as soon as possible. Does the child need to be vaccinated against the flu recently, as they have just contracted the flu? Is it still possible to get vaccinated now? In response to the hot issues that parents are concerned about, a reporter from Yangcheng Evening News interviewed Deputy Chief Physician Li Honggui from the Pediatrics Department of the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine. Yangcheng Evening News: The child has been infected with Mycoplasma in November and still coughs and has a runny nose. Can they be vaccinated against influenza in this situation? Li Honggui: For children with acute diseases, severe chronic diseases, or acute episodes of chronic diseases, as well as fever, it is recommended to wait for the condition to recover or stabilize before receiving the influenza vaccine. The child has been infected with Mycoplasma and still has respiratory symptoms such as cough and runny nose. It is recommended to delay vaccination. Yangcheng Evening News: Does it still be necessary to get vaccinated against the flu if your child has just contracted it recently? Li Honggui: Children are a high-risk group for influenza and also a high-risk group for severe cases. Every year during the influenza epidemic season, the incidence rate of influenza in children in China is 20% to 30%; During the high prevalence seasons of autumn, winter, and spring, the annual infection rate of influenza in children can reach around 50%. Influenza viruses are classified into types A (type A), B (type B), C (type C), and D (type D) based on the antigenicity of their nuclear and matrix proteins. It is clear that influenza viruses that can infect humans and cause diseases include three types: A, B, and C. Children's influenza is mainly caused by A and B influenza viruses. Due to the lack of cross immune protection between different types of influenza viruses, different subtypes also do not have cross immunity. For example, if a child has just contracted influenza A and there is still an outbreak of influenza B virus during the same period, this child may come into contact with a patient with influenza B virus and may still be infected. So even if you have just caught the flu, you can still get vaccinated against it, which can provide better protection and reduce the occurrence of severe cases. The influenza vaccines approved for marketing in China include trivalent inactivated vaccine (IIV3) and tetravalent inactivated vaccine (IIV4). Traditional trivalent influenza vaccines are used to prevent influenza A H1N1, influenza A H3N2, and influenza B/Victoria (BV) strains; In addition to the three influenza viruses mentioned above, the quadrivalent influenza vaccine has added another subtype of influenza B - the B/Yamagata (BY) strain of influenza B. Yangcheng Evening News: Many children and classmates have caught the flu. Is it still possible to get vaccinated against the flu now? Li Honggui: After receiving the influenza vaccine, it usually takes 2-4 weeks for us to produce sufficient protective antibodies. Therefore, in order to ensure that children receive immune protection before the high incidence season of influenza, we need to vaccinate them in advance according to the peak time and duration of influenza in different regions, which can better prevent influenza and protect our children. If the best vaccination time has been missed, and even if there is an outbreak of influenza virus in the local area, although it is a bit late, receiving influenza vaccine can still benefit, so it is still recommended to get vaccinated. Yangcheng Evening News: My child has already been vaccinated last year