This may help settle the long-standing uncertainty as to whether the well-documented risk of ALS among workers is related to electric shocks or exposure to power-frequency magnetic fields. As Anke Huss and coworkers conclude: “[O]ur study provided no evidence that ALS is associated with electrical shocks at work. We did find that ALS is associated with occupational exposure to medium or high levels of extremely low-frequency magnetic fields among workers with a higher likelihood of being long-term exposed to ELF-MF.” For some background, see the group’s earlier presentation, its paper on exposure assessment and our report from 1998 (p.4).
