The mystery behind a cluster of pneumonia cases which got 11 people sick and killed four in Argentina has been solved.
Health authorities have said that the outbreak was likely to be caused by the Legionella bacteria, which leads to Legionnaires' disease.
The cases appeared between August 18 and August 25, with patients complaining of fever, muscle and stomach pains as well as difficulty in breathing along with pneumonia symptoms, according to the World Health Organisation.
