In Eastern Europe (and many other parts of the world), there is a general distrust of the authorities. One of the users from Russia made a post here regarding the situation there. Especially among the older generations, there may be large sections of the population who doesn't want to get vaccinated. Now I am not sure whether these people would suddenly agree to get vaccinated since the lottery is there, but overall it is a good initiative from the Polish government. Also, the vaccines have limited shelf life. They need to be administered before they expire.
The vaccination campaign in Russia is gaining more and more opponents, not only for historical reasons, but also because people here and there see the ineffectiveness of vaccination. Yesterday I was at work after almost a week's absence and found that 5 of my colleagues were sick. 2 of them were vaccinated, two were not, and another was vaccinated and a day after vaccination he felt bad (apparently the vaccine hit the already weakened immunity, since apparently he was already sick when he did it). And such cases are found in different circles of different acquaintances, from the outside it looks like the Russian vaccine does nothing against infection, plus it can provoke a severe course of the disease.
By the way, we have another person at work who has already recovered, but his story is as follows: he had a mild illness once, after which he was vaccinated and a couple of months later fell ill again, but this time in a severe form.
