Electromagnetic Fields in Biology and Medicine

425Dirty Electricity within the Intermediate-Frequency Range

a teacher’s cancer risk by 21%. Two rooms had high magnetic elds, and this was not associated

with the cancer risks.

The authors concluded that, “The cancer incidence in the teachers at this school is unusually high

and is strongly associated with high frequency voltage transients… If our ndings are substantiated,

high frequency voltage transients are a new and important exposure metric and a possible universal

human carcinogen similar to ionizing radiation.”

There is only one other study that found a link between IF and cancer. Armstrong et al. (1994)

found an association between cumulative exposure to HF transient elds (which they refer to as

short-duration pulsed EMFs) and lung ...