Well that's how they make it sound, but they actually just said not annually.
But it doesn't make a lot of sense to me since influenza will be mutating to escape the immune response.
But it doesn't make a lot of sense to me since influenza will be mutating to escape the immune response.
Not all mutations are equal; the flu has antigenic factors that rapidly change in response to evolutionary pressure that don't significantly affect the fitness of the virus. If you're able to target another element of the virus that is conserved, or target a large segment of the possible antigenic conformations in a single vaccine, you'd force immune evasion mutations to significantly lower the virus's fitness, which is a very big deal.
unless there is sufficient number of people that take it and it works well enough to eradicate it like say polio was.
It’s not like governments stated that the vaccines are both safe and effective and indirectly put pressure on people to get the vaccine, after all.
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