As a participant in the Moderna study, they take blood tests at every visit, the first a long visit where they took a very complete medical history and when the first shot is administered, the second a month later when the second shot is administered, and the third visit another month later with follow up questions. Eight vials of blood, some of which is tested at the time and some of which is stored for later comparisons or analysis as more testing is likely developed. I am sure they know if a participant has had it, they also did the nasal test during the first two visits. They keep tabs on whether any symptoms arise and will track for two years with questions and occasional visits.
I don’t know if I got the vaccine or placebo, but the first shot was a little sore for a few days like after a tetanus shot. Second shot no pain. No symptoms after either shot.
I started traveling quite a bit after starting the study and hope I got the vaccine due to a lot of exposure in the airports and planes. Flying about once a week.
Thanks for the info.