Why did the collapse of communism lead to increased mortality in eastern europe

The collapse of communism lead to increased mortality in eastern europe due to the fact that in this period of history people were completely poor and had no such advantages as health services, that lack of needed conditions caused many deaths which decreased level of population. But after the collapse of communism Eastern Europe come upon some benefits : it obtained greater freedom of movement and established contact with Western Europe. After 20 years Eastern Europe blossomed out and achieved very fast-growing economy