On: No one who got Moderna's vaccine in trial developed severe Covid-19

[alisonkisk]

They don't fullly know. They rely on statistics.

I hope they at least ask subjects about exposure.

[justinc8687 → alisonkisk]

I'm in the AZD1222 (AstraZeneca) trial, and for the next two years, I need to fill out an online symptom questionnaire every single week. They also draw blood at the 6-month and 1-year mark, so presumably could test for antibodies.

[nradov → alisonkisk]

Subject reports of exposure are notoriously unreliable. People forget. And even when anonymity is guaranteed they lie about shameful behavior.