Largest Real-World Study Of 1.2 Million People Shows Pfizer COVID-19 Vaccine Is 94 Percent Effective<br/><a href="https://www.iflscience.com/health-and-medicine/largest-realworld-study-of-12-million-people-shows-pfizer-covid19-vaccine-is-94-percent-effective/" rel="noreferrer noopener" target="_blank">iflscience.com</a>