(ANSA) - ROME, APR 30 - President Sergio Mattarella lamented the scourge of labour-related deaths in Italy as his visited the Tuscan town of Pontedera on Thursday in view of the May Day national holiday for workers. "There is a plague that shows no sign of healing, with reports of workers losing their lives on the job continuing," he said. "Workplace safety remains a commitment on which there can be no compromises or concessions. "The toll is unacceptable". Workplace deaths are a major proble...