FLORENCE - In the storm of infection and death sweeping Italy, one big community stands out to health officials as remarkably unscathed - the 50,000 ethnic Chinese who live in the town of Prato. Two months ago, the country’s Chinese residents were the target of what Amnesty International described as shameful discrimination. But in the Tuscan town of Prato, home to Italy’s biggest single Chinese community, the opposite has been true. Once scapegoats, they are now held up by authorities as a model for early, strict adoption of infection-control measures. Ethnic Chinese make up about a quarter of Prato’s population,...