The Science of Flu Mutations: Why Doctors Recommend Yearly Shots
Every year, healthcare professionals emphasize the importance of getting a flu shot—and there’s a solid scientific reason behind it. The influenza virus is constantly evolving, which means last year’s vaccine may not fully protect you this year. Understanding how and why these mutations occur helps explain the need for annual vaccination and why it remains one of the most effective strategies for preventing widespread outbreaks.
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