In the next few decades Bulgaria will lose about 39% of its population, followed by Romania with 30% and Poland with 15%.

While the West compensates for at least some of the lack of work force with immigration, and for example Poland receives many Ukrainians, small countries in the East have a problem. Here, ethno-nationalism prevails and the fear of the vanishing of the nation is strong. For those for whom 1989 also marked the formation of an ethnically homogenous state, immigrants from out of Europe are not an option.

https://voxeurop.eu/en/2020/eastern-exodus-5124352