Patricia Marín still remembers the day nine years ago when her daughter Azul started coughing and couldn't stop. Her breathing was ragged.
At the time, Azul was just 18 months old. Marín brought her to the emergency room.
"The hospital got her symptoms under control," Marín says, "but, a week later, she stopped being able to breathe again and I had to take her back."
It was a cycle. By the time her little girl was 5, Marín says, "Azul lived in the emergency room."