24 forecasters

What will be the vaccine efficacy of the two-dose Johnson & Johnson Ad26.COV2.S vaccine candidate according to the results of Phase III testing?

Latest estimate

89.8

Forecast Timeline

Authors:

Opened:

Mar 12, 2021

Closed:

Oct 4, 2021

Scheduled resolution:

Feb 1, 2026

Spot Scoring Time:

Mar 14, 2021