On Monday night, tenants of 1600 Sedgwick Ave in Morris Heights came home to a letter from the New York City Department of Health, notifying them that two tenants of the building had tested positive for Legionnaires’ disease. The two cases of Legionnaires’ disease were diagnosed about 12 months apart from each other. The New York City Department of Health held a meeting at the Sedgwick Ave building Monday night, and indicated that they are in the process of testing the building’s water supply as a possible source of the Legionella bacteria that caused these two cases. In the meantime,…