Five factors could be behind weakening of COVID-19 pandemic, expert says
Dr. Paul Sax, a Brigham and Women’s Hospital infectious disease specialist, says there are five factors that could be behind the weakening of the coronavirus pandemic in Massachusetts and across the nation, but it’s not clear which factor, or combination of them, is responsible.

Here are the five factors Sax outlined.

More coverage:
Charts: Signs suggest the pandemic is weakening, but experts still urge caution
The latest COVID-19 numbers from Massachusetts
COVID-19 vaccine news, resources, and guidance
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