A group of people affected by toxic humidifier sterilizers plan to file a class-action lawsuit next month against the manufacturers, distributors and the government.

The group of plaintiffs, the Asian Citizen’s Center for Environment and Health, and Lawyers for a Democratic Society or Minbyun held a news conference on Tuesday in southern Seoul to announce the plan.

Minbyun lawyers who will represent the plaintiffs plan to form the first group of litigants for the lawsuit by May ninth and file a suit on May 30th. One-hundred-50 people, including 74 victims, have so far expressed intent to join the lawsuit.

The amount of damages is expected to range between 30 million and 50 million according to the level of damage.

Four victims previously lost in a damage suit against the government last year.