Once, in a three-day taping that included several sadists, the material was so overwhelming that both the film crew and I got sick - I with a sinus infection, and the entire film crew with a flu so severe they had to delay their departure from the motel. Our immune systems had weakened, I believe, from the beating out souls had taken.
Stray voltage/current/frequency is the most serious form of exposure. Electrocution kills very few people per year. Stray voltage/current/frequency exposure is suspected to be making people sick in the millions!
It has been known for many years that a subset of the population cannot tolerate the radiation emitted by transmitting utility meters and sickness results in these people.
Oxygen deprivation and supplemental oxygen are both bio-hazards for Mauna Kea workers