And this is the pulse of the

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From flu season. They start looking at the viruses and seen what does it look like this year? They take samples from all over the world, and they make predictions about what they think It's going to look like six months from now. So when you're getting the flu vaccine, essentially what you're getting is a formulation that was based on an educated guess, from the scientists of what was circulating about six months ago. There's this conundrum of why do we get a polio virus vaccine warmer a child and that protects us against all the polio virus strains that seemed to be circulating around the world and it protects us for life but flew. We need to get the vaccine every year.

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