A Boston Quizno's employee was diagnosed with hepatitis A in June, 2004. Upon notification of the potential for a hepatitis A outbreak, the Boston health department advised consumers who had eaten at the Quizno's Subshop located at 74 Summer Street in Boston to receive Immune globulin shots to prevent infection.
Marler Clark filed a Class Action lawsuit against Quizno's on July 9, 2004. The lawsuit was filed on behalf of all persons who were required to be inoculated against hepatitis A following possible exposure to the virus at the Quizno's restaurant. All claims were resolved.