Ernesto Villegas said the president was following a strict treatment regimen for "respiratory insufficiency" caused by the infection.

CNN: Venezuelan court says inauguration day delay OK for Chavez

Though the infection is controlled, the president will continue to require "specific measures to solve respiratory insufficiency, " read the Sunday statement.

CNN: Venezuela says Chavez is improving

The president, who announced his cancer diagnosis in 2011, spent more than two months in treatment in Cuba and has suffered respiratory insufficiency.

CNN: President Hugo Chavez 'fighting for his life'