In late February, Biogen held a medical conference in Boston, Massachusetts.<br />According to Business Insider, contact tracing revealed 100 cases of COVID-19 were directly linked to the event.<br />And a new report finds that those cases, in turn, may have led to 300,000 new cases of the novel coronavirus.<br />By studying and tracing the genetic code of the virus, scientists determined up to 300,000 cases could be attributed to the conferences through November 1.<br />COVID-19 cases linked to the Biogen conference were found in 29 states.<br />29% of the cases with the genetic marker from the conference were found in the state of Florida. Cases were also found in Indiana and North Carolina.