Safety
4. What are the results of the research done already?
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| The research done thus far has |
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| produced conflicting results, and |
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| many studies have suffered from |
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| flaws in their research methods. |
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| Animal experiments investigating |
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| the effects of Radio Frequency |
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| (RF) energy exposures |
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| characteristic of wireless phones |
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| have yielded conflicting results |
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| that often cannot be repeated in |
Safety | other laboratories. A few animal | |
studies, however, have suggested | ||
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| that low levels of RF could |
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| accelerate the development of |
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| cancer in laboratory animals. |
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| However, many of the studies |
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| that showed increased tumor |
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| development used animals that |
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| had been genetically engineered |
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| or treated with |
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| chemicals so as to be pre- |
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| disposed to develop cancer in |
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| the absence of RF exposure. |
90Other studies exposed the
animals to RF for up to 22 hours per day. These conditions are not similar to the conditions under which people use wireless phones, so we do not know with certainty what the results of such studies mean for human health. Three large epidemiology studies have been published since December 2000. Between them, the studies investigated any possible association between the use of wireless phones and primary brain cancer, glioma, meningioma, or acoustic neuroma, tumors of the brain or salivary gland, leukemia, or other cancers. None of the studies demonstrated the existence of any harmful health effects from wireless phone RF exposures. However, none of the studies can answer questions about long- term exposures, since the average period of phone use in these studies was around three years.