Why do flu vaccines require an annual update?
In short: Unlike mumps or rubella, which offer lifetime protection after two early shots, the flu requires a new vaccine every year. This video explores the science of flu viruses and why researchers must constantly design new vaccines for each upcoming season.
The video examines why influenza viruses are uniquely challenging compared to other diseases. While vaccines for mumps and rubella provide long-term immunity, the flu necessitates a continuous global effort to stay ahead of the virus.
To prepare for each new season, hospital researchers worldwide collect patient samples and send them to virology experts. Their goal is to identify the specific strains needed to design the next year's vaccine.
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Sources
- Summary by Intellect · source: How often should you get a flu shot? - Melvin Sanicas
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