How did a Biogen event turn into a Covid-19 outbreak? State officials aren’t saying.

A Biogen event has been cited as one of the catalysts behind the sharp increase in Massachusetts coronavirus cases at the outset of the pandemic’s outbreak, making the Bay State one of the worst-hit states at the time. Despite repeated, formal requests, state officials have yet to disclose many of the public documents that could shed light on the outbreak’s earliest days.