thank you. please advise if vaccination is a must or how does it work? is it dangerous or no? pls advise

I'm not familiar with the vaccine given in your locale, in the former Soviet Union. But in general, the doctors are the one's with the information and they should be making such decisions. Accordingly, in Israel, the vast majority have been vaccinated based on what the doctors' said, and that's what has all but stopped the Corona/Covid plague. Israel has begun this week even vaccinating children (with the proper dosage). Unless you have heard otherwise by your trusted doctor, you should surely follow the vast majority of doctors who obligate the vaccination (assuming that your local vaccine is similar to that used in the west).