Massachusetts June 27, 2023 8:40 pm COVID cluster prompts masking at Beth Israel Deaconess Medical Center A mask requirement has returned to a unit of a Boston hospital affected by a cluster of COVID-19 cases. US & World Videos 3:55 Forecast: Not a bad weekend ahead 2:06 Two Medford middle schools have lead in the water 2:17 Boston hotel workers threatening to walk off the job in major escalation 0:24 Off-duty nurse helps child not breathing in car in Boston's Jamaica Plain 2:03 Parents and teachers demand action as mold problems plague Cape Cod elementary school