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by refurb 2105 days ago
You can look up those details on clinicaltrials.gov. They will list the timeline for the primary endpoint. That doesn't include recruitment delays though.

Here are the details for the Oxford/Astrazeneca vaccine.[1] It's a 1 year trial. From what I've seen, they vary in length, but have interim analyses scheduled on a regular basis (3-6 months). If they see a strong signal, they can seek approval based off that interim data.

[1]https://clinicaltrials.gov/ct2/show/NCT04536051?term=ChAdOx1...