seven patients, all them living, working, or visiting the morris park seck. are -- morris park section. are we in for another legionnaires' out break? aj ross. >> seven new cases with one common denominator. this morris park community. the health department learned of these cases all within the last week and they've since been aggressively testing all the cooling towers in this area hopefully trying to narrow down a source. >> quite concerned when i heard about it earlier today because i know it had been relegated to the south bronx. >> i thought it was under control but it's not. >> reporter: it's a term bronx residents have become all too familiar with and one that's haunted them for months. legionnaires' disease is back again but this time it's in morris park and just where the bacteria is coming from is a mystery. >> because we identify this as a cluster doesn't mean we know what the cause is of these infections in these individuals but they are geographically linked. >> reporter: seven new cases have been identified in the last week according to the healt