The initial tests prior to approval looked to see if severe infection could be reduced. Follow up studies have shown that they are also effective at preventing

The initial tests prior to approval looked to see if severe infection could be reduced. Follow up studies have shown that they are also effective at preventing transmission. https://www.nationalgeographic.com/science/article/yes-vaccines-block-most-transmission-of-covid-19 https://www.nationalgeographic.com/science/article/yes-vacci...