Harvard health economist Thomas McGuire testified that prescription opioids have caused an estimated $3.3 billion in damages. In the landmark trial, Cabell County and the city of Huntington accuse drug distributors AmerisourceBergen, Cardinal Health Inc. and McKesson Corp. of fueling the opioid epidemic. The companies have maintained that poor communication and pill quotas set by federal agents are to blame for the epidemic, along with a rise in prescriptions written by doctors. The landmark trial is expected to resume June 28.