Effective of vaccines against Delta according to Public Health England.

This data isn't new, but for those who haven't seen it yet Public Health England published their Delta vaccine effectiveness data in NEJM.

Pfizer is 88% effective against symptomatic infection after two doses against Delta.

AstraZeneca is 67% effective against symptomatic infection after two doses against Delta.

The first dose for both is substantially reduced in effectiveness compared to Alpha (35.6% for Pfizer and 30% for AstraZeneca). Hence why everyone that is partially vaccinated should get their second dose as soon as possible.

Unlike Israel's vaccine effectiveness data, PHE did a test-negative case-control study for vaccine effectiveness. Vaccinated and unvaccinated tested groups were compared to each other by odds ratio, rather than by total vaccinated population vs total unvaccinated population.

Link to study : https://www.nejm.org/doi/full/10.1056/NEJMoa2108891