3 ms·
They don't fullly know. They rely on statistics. I hope they at least ask subjects about exposure.
by alisonkisk 6y ago
They don't fullly know. They rely on statistics.
I hope they at least ask subjects about exposure.
- nradov 6y agoSubject reports of exposure are notoriously unreliable. People forget. And even when anonymity is guaranteed they lie about shameful behavior.
- justinc8687 6y agoI'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.