A facebook friend posted this link to an overview of Coronavirus Disease 2019 (COVID-19) Cases in MA (pdf link), and pointed out that three quarters of coronavirus cases in Massachusetts are attributable to a conference in Boston for a company called Biogen.

NBC Boston has more: After Spreading Coronavirus, Boston Biogen Meeting Serves as Stark Warning

As the NBC Boston link says, this should serve as a warning. Don’t hold these large gatherings while a pandemic is going on. It will create a easy path for the virus to spread, making it more likely it will get in contact with vulnerable people.