Massachusetts August 25, 2020 6:39 pm Biogen Conference Linked to 20K Cases A conference held by Biogen in February may have led to 20,000 coronavirus cases, according to a new study. US & World Videos 4:02 ‘To Catch a Contractor' series leading to changes 1:02 20% of nurses to leave field within 2 years 6:03 Tensions rise during campus protests at MIT and Harvard 1:05 Marking construction safety week in Boston 20:19 Karen Read's attorney accuses witness of perjury at murder trial