Unlike experimental drugs given to the sick, vaccines are intended to be given to masses of healthy people. So they must clear a high bar of safety standards. If hundreds of millions of people get a vaccine, even a rare side effect could crop up in thousands of people.
Unlike experimental drugs given to the sick, vaccines are intended to be given to masses of healthy people. So they must clear a high bar of safety standards. If hundreds of millions of people get a vaccine, even a rare side effect could crop up in thousands of people.
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