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. 2021 Jul 21:NEJMoa2108891. doi: 10.1056/NEJMoa2108891

Figure 1. Vaccine Effectiveness against the Alpha and Delta Variants, According to Dose and Vaccine Type.

Figure 1

Shown is the effectiveness of one dose and two doses of the BNT162b2 and ChAdOx1 nCoV-19 vaccines, or either vaccine (“any”), against symptomatic disease with the B.1.1.7 (alpha) or B.1.617.2 (delta) variant of the severe acute respiratory syndrome coronavirus 2. 𝙸 bars indicate 95% confidence intervals.