According to an article published on September 23, 2021 in the New England Journal of Medicine, the BNT162b2 and mRNA-1273 vaccines were highly effective under real-world conditions in preventing symptomatic Covid-19 in health care personnel, including those at risk for severe Covid-19 and those in racial and ethnic groups that have been disproportionately affected by the pandemic.
The article can be obtained at https://www.nejm.org/doi/full/10.1056/NEJMoa2106599?query=featured_coronavirus.