Massachusetts has been in the final phase of reopening, Phase Four, since March 22. As of Monday, one million more Massachusetts residents are eligible to receive the COVID-19 vaccine. That includes people over age 55, and those with a qualifying health condition, such as moderate to severe asthma, a heart condition, or type-1 or type-2 diabetes.

In addition, 90% of Massachusetts school districts returned to full-time, in person learning for elementary students.

Meanwhile, new coronavirus cases in schools have hit a record high for the academic year. So how do we make sense of these competing milestones? We speak with Dr. Davidson Hamer, a professor of infectious diseases and medicine at the Boston University School of Medicine, and a professor at Boston University School of Public Health.