On March 3, 2003, WLF scored a major victory when the Supreme Court of California held that a suit for medical monitoring costs could not proceed as a class action. The plaintiffs alleged that they had been exposed to chemicals allegedly disposed of by the plaintiffs. They did not allege that they had been injured; rather, they sought to recover expenses related to medical monitoring because of their fears that they might suffer injury in the future. The Court agreed with WLF that class action status was inappropriate because members of the proposed class had faced widely varying exposure levels and thus the strength of their claims for medical monitoring varied too widely to permit the case to be considered on a class-wide basis.