No two years are the same: Why you need an annual flu shot

No two years are the same: Why you need an annual flu shot

We’re told we need a new vaccine every year. We’re told we can’t risk a mismatch between the flu viruses circulating and the antibodies in our systems. After all, if our antibodies don’t recognise a flu virus when it attacks us, they can’t block it – and that would mean the virus could launch its attack.

Let’s explore how flu viruses change from year to year, and how the flu vaccine changes to boost our immune systems and help us avoid serious illnesses from the flu.

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