Here is an important video from Vox, produced by Laura Bult, “The risky way to speed up a coronavirus vaccine.”
That is, challenge volunteers who have been vaccinated with the infection.
Some of the volunteers say it is their moral imperative to do it, if young and healthy.
This video applies to the Oxford Astraxeneca vaccine in the UK.
The date is -Aug. 12 and we haven’t heard of illnesses yet. But they will also check to see if they have silent nose and throat infections that can be spread to others. During the trials, they will still be in quarantine (and paid).