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Emf blocks are created in order to stop electromagnetic radiation from the an environment. This includes computers, cell phones, and crystals. These fields can cause damage in the human body. There are a variety of shielding materials, like magnetic and metal materials. They are also referred to as electromagnetic shields. These shields are important to prevent the development of cancer and other health issues. High-frequency electromagnetic fields The electromagnetic field of high frequency (HFEMFs) can impact the bacteria as well as other cell types in a var