As you may already be aware, in March 2017, scientists from around the world met at the International Agency for Research on Cancer (IARC; Lyon, France) to evaluate the carcinogenicity of welding fume. Based on substantial new evidence through observational and experimental studies, welding fume has now been reclassified from  “possibly carcinogenic to humans” as it was originally classified in 1989 to its new Group 1 classification as “Carcinogenic to Humans”. The working group concluded that there is “sufficient  evidence in humans” that welding fumes cause lung cancer and limited evidence for kidney cancer.

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