Re: Covid-19
it was known in the fall that this past year's flu vaccine had missed the mark, and that this year's flu would be more widely and severely experienced.
the flu varies each year, but the vaccine must be manufactured in volume before that year's illness itself really appears. thus each year's vaccine is based on informed guesswork about the virus to come.
it was known in the fall that this past year's flu vaccine had missed the mark, and that this year's flu would be more widely and severely experienced.
the flu varies each year, but the vaccine must be manufactured in volume before that year's illness itself really appears. thus each year's vaccine is based on informed guesswork about the virus to come.
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