At least two law firms have filed lawsuits in the multi-state Hepatitis A outbreak linked to frozen berries sold at Costco and other stores.

Seattle-based Marler Clark filed a class action lawsuit against berry producer Townsend Farms “on behalf of all individuals who received hepatitis A vaccination or immune globulin injections to prevent infection with hepatitis A after eating the frozen berry and pomegranate blend,” the firm announced, in a statement.

Houston-based Simon & Luke, which also specializes in food safety cases, filed suit along with co-counsel Gomez & Iagmin against Costco Corp. and Tounsend Farms in Superior Court of San Diego County, Calif. on behalf of a consumer, after filing a previous suit in Los Angeles on Monday, on behalf of another consumer.