“…Previous studies 13,14,15 have noted a variety of acute and chronic health problems associated with arc welding, which have not clearly been attributable to any single metal fume or gas exposure, but which may be related to the combined effects of different exposures created by arc welding. Some metal fumes and gases generated by welding are respiratory irritants, and symptoms of eye, nose, and throat irritation, as well as cough and phlegm production, have been reported by welders in association with their work shift.…”