CDC study notes vaccines are less efficacious against Delta, reducing risk by two-thirds, the data shows that the unvaccinated are by far experiencing more severe disease and hospitalizations. That is the important metric. #vaccineswork

Medical Mythbusting Commentary for August 25, 2021

Vaccines are less protective against Delta infection but still reduce risk by two-thirds, CDC study shows

Effectiveness of COVID-19 Vaccines in Preventing SARS-CoV-2 Infection Among Frontline Workers Before and During B.1.617.2 (Delta) Variant Predominance — Eight U.S. Locations, December 2020–August 2021

Vaccine efficacy, effectiveness and protection