"A full course of the Pfizer-BioNTech vaccine is 64% effective at preventing symptomatic Covid-19, according to an early study by Israel’s health ministry repor

"A full course of the Pfizer-BioNTech vaccine is 64% effective at preventing symptomatic Covid-19, according to an early study by Israel’s health ministry reported Monday, much lower than previous estimates of nearly 90%. The vaccine still appears to be highly effective, 93%, at preventing serious illness and hospitalization, the data shows, though this is also slightly lower than earlier studies suggested and for other variants." Source: https://www.forbes.com/sites/roberthart/2021/07/06/pfizer-shot-much-less-effective-against-delta-israel-study-shows---heres-what-you-need-to-know-about-variants-and-vaccines/?sh=7527b24d3071 https://www.forbes.com/sites/roberthart/2021/07/06/pfizer-sh...