umieralność v angličtině:

The infant mortality rate in Sierra Leone is high.

Definition mortality is the number of people who die in a particular group, at a particular age, in a particular place, or in a particular period of time

The mortality rate among malaria victims is very high in some countries.

It comes as two people have died from the virus - which has a mortality rate of 15 per cent in those over 80 - on British soil so far, both of whom were elderly.