Currently, the United States is witnessing approximately 150,000 new instances of delta each day, with 100,000 hospitalizations. The efficacy of existing vaccinations has decreased due to delta’s dominance, although immunization provides adequate protection. Before introducing the delta vaccine, those who had had a complete vaccination were 16.6 times less likely to die from COVID-19 (confidence interval of 9.1 to 13.9). According to the scientists, the efficacy of the vaccination against infection decreased from 91 percent to 78 percent when delta was included in the equation. In addition, the efficacy seems to have decreased from 92 percent to 90 percent when it comes to preventing hospitalizations.

According to the study’s findings, vaccines were about 87 percent efficient in preventing hospitalization compared to baseline vaccine efficacy. In addition, people between 18 and 64 were protected from hospitalization at an extraordinary 95 percent. However, just 80 percent of those 65 and older were protected. It is unclear whether the declines seen in the trials are related to the power of the delta variant itself or a gradual deterioration of protection after the first immunization shot.

Reference
Unvaccinated are 5X more likely to catch delta, 11X more . https://arstechnica.com/science/2021/09/unvaccinated-are-5x-more-likely-to-catch-delta-11x-more-likely-to-die/