COVID Q&A January 3, 2023 1:35 pm COVID Q&A: Is XBB Contributing to Rising Wastewater Levels? Top Boston doctors talk about what could be causing the biggest spike in COVID-19 wastewater levels Massachusetts has seen in a year during NBC10 Boston’s weekly “COVID Q&A” series. US & World Videos 1:02 20% of nurses to leave field within 2 years 1:05 Marking construction safety week in Boston 20:19 Karen Read's attorney accuses witness of perjury at murder trial 5:31 Inside the takedown of Mass. catalytic converter theft ring 2:39 Bruins try not to ‘dwell on the past' ahead of Game 7 against Toronto Maple Leafs