If the virus that causes flu were an ice cream cone, then the yearly vaccine teaches the immune system to recognize just the scoop – chocolate one year, strawberry the next. As the virus changes each year, so too must the vaccine.
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If the virus that causes flu were an ice cream cone, then the yearly vaccine teaches the immune system to recognize just the scoop – chocolate one year, strawberry the next. As the virus changes each year, so too must the vaccine.
Read More
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