a rare mosquito virus is causing concern in Massachusetts towns a rare but deadly mosquito virus has Massachusetts towns on high alert this summer Eastern equin and sephtis is prompting Park closures and outdoor warnings in several communities State Health officials reported an 80s man as the first human case since 2020 in Massachusetts four towns are urging residents to avoid outdoor activities during the evening and at night vigilance is crucial as officials continue to monitor the spread of this dangerous disease stay informed and protect yourself from mosquito born diseases