UnitedHealth Group Inc said on Monday it would buy control of Amil Participacoes SA, Brazil's largest health insurer and hospital operator, for $4.9 billion as it moves to capitalize on a fast-growing private healthcare market.

Below are some key facts about the healthcare system in Brazil:

Sources: Brazilian health regulator ANS, Amil

(Compiled by Walter Brandimarte and Debra Sherman. Editing by Andre Grenon)