[patrakov]

You should not trust even paper certs. At least in Russia, too many of them are bought by anti-vaxxers. I.e., some doctors responsible for vaccination, given some extra money, do everything they need to do, except the actual injection.

P.S. My re-vaccination attempt failed on October 22nd. 270 people in the queue before me, some are sneezing, no social distancing at all, so I decided not to risk. I still have a valid certificate from March 18th.