Thousands of patients struggling with the collapse of the health system will receive free treatment.
The pop icon, designer, actress says she "couldn't be more proud" to take on the government role.
The sight of hungry Venezuelan migrants on country roads has become commonplace in South America.
Broadcast time 08:06 BST - 08:30 BST
Broadcast time 11:06 BST - 11:30 BST
Broadcast time 13:06 BST - 14:00 BST
Broadcast time 19:06 BST - 19:30 BST
Do you know these 13 alternate words for rain?
Sign up for our newsletter