Each year, the Centers for Disease Control and Prevention (CDC) choose the specific strains to be targeted with the annual flu shot based upon an examination of thousands of influenza virus samples collected from patients worldwide. The selection process is not easy, and the challenges involved in choosing the most-effective formulation of the flu vaccine in any given year are largely to blame for the flu shot’s limited effectiveness in recent years.
Now, however, scientists may have found a more-effective way to choose vaccines for future seasons. Using new “HINT” technology, scientists believe that it may now be possible to better identify the flu strains that most likely to infect people year to year.
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