Influenza viruses change with time, and the CDC recommends that people take their flu vaccines early in the fall before the peak season starts. This provides their bodies with adequate protective antibodies to make them easily pass the season without infection. Mostly, CDC recommends that people get vaccinated by October; however, they do not limit or stop individuals who may wish to have flu vaccines later in the year and also in January because it is also advantageous to infection prevention. For children requiring two doses, CDC recommends that they get vaccinated early to offer adequate time for the second dose, which is four weeks later, to ensure adequate protection against influenza. During data collection for influenza centres, three types of information are researched: The various virus strains causing infection, their spread mechanism and previous vaccine outcomes with the specific strains detected. This is done in 5 centres, namely:
The Centers for Disease Control and Prevention in the United States of America
The National Institute for Medical Research (The Francis Crick Institute) in the United Kingdom
The Victoria Infectious Diseases Reference Laboratory in Australia
The National Institute for Infectious Diseases in Japan
The National Institute for Viral Disease Control and Prevention in China
According to Scientific American (n.a), scientists from the above facilities use the data received to make identify new influenza strains in the population and also make decisions about the upcoming season is aspects of virus strains, spread and infection cause. The scientists meet twice a year in February and September to give recommendations for the upcoming peak season and review results for future clinical reference respectively. WHO organizes research and vaccine development to determine strains and appropriate regimes in various countries guided by the five major centres of research. In the U.S. The Food and Drug Administration (FDA) holds the final decision about influenza vaccine components based on an advisory from regional centres scientists' board on the upcoming February season.
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References
Scientific American. Retrieved from https://www.scientificamerican.com/article/how-are-seasonal-flu-vaccines-made/
Centres for Disease Control and Prevention. Influenza. Retrieved from https://www.cdc.gov/flu/about/season/flu-season.htm
