Swedish steelmaker SSAB is continuing its investigation into mysterious illnesses among workers, Vestmanlands Läns Tidning reported, and the probe remains ongoing. The newspaper said the investigation has involved more than 150,000 tests or samples. The specific nature of the testing and the symptoms observed have not been described in the report, according to the newspaper, and no cause has been determined.
The context of the testing—whether it involved sample collection from individuals or environmental checks—has also not been detailed, the newspaper added.