What safety precautions are needed to reduce my chances of developing manganism or Parkinson’s disease from welding fumes?
Your employer can reduce your risk from welding fumes by providing good ventilation, shielding, protective equipment, and other controls. Ventilation includes hoods, roof vents, and fans. Good respirators help, but are not a substitute for proper workspace ventilation. Your employer must monitor the air and keep your manganese exposure within certain legal limits. See Worker Safety Issues and Manganese in Welding Fumes.