To prevent means to take any possible action to avoid the risk of damage, whether it results from a direct relation of cause and effect due to exposure to electromagnetic fields, or indirectly from the malfunctioning of electronic equipment, a medical diagnosis, or a financial analysis.
In the end, the term risk suggests the likelihood to suffer damage. Can we afford it?
What does “preventing” mean?
Essentially TO PREVENT means:
to protect people from the risk of suffering harm due to the exposure to an electromagnetic field – a danger that usually requires to set limits of exposure below the level which causes a proven biological effect or negative interactions with electronic equipment.