Chronic shortages of medicine in Venezuela forced his family to ask for drug donations so Ibarra could undergo five surgeries on his skull and treatment for infections from the Guaire river.

Ibarra, who cannot return to his studies any time soon, needs a sixth operation and therapy. It is unclear if he will fully recover.

"I speak to my son a lot, and sometimes he makes me understand it was not worth suffering this, that he regrets it, that it was a mistake," said Ibarra's father Jose at their small home in the sprawling hilltop slum of Petare in Caracas.

"But other times he's clearly telling me that it was worth fighting for a change he believes in."