> Therefore, a 91% effective metric for vaccines means that 91% of those who receive that vaccine are expected to NOT contract COVID 'at all'. Thing is though, many vaccines broadly do not prevent disease but shift the severity upon contraction.
But I was just reading about another study of medical personnel who were taking periodic COVID tests so as to catch asymptomatic transmission, and I believe this study (or maybe merely the media about it) also used "effectiveness".
But I was just reading about another study of medical personnel who were taking periodic COVID tests so as to catch asymptomatic transmission, and I believe this study (or maybe merely the media about it) also used "effectiveness".