• Mercury News, Monday, October 11, 2010 12:47 PM

Hold the phone! Following several months of investigation and research, Mercury News' Chris O'Brien has concluded: "Nobody knows for sure whether cell phones are a health hazard." Needless to say, "That has surprised me and made me nervous," says O'Brien. According to O'Brien, a small but growing number of scientists and health activists are challenging the largely accepted belief that low levels of radiation generated by cell phones and towers have no effect on human biology.

One man leading the charge is noted epidemiologist Devra Davis, a visiting professor at Harvard University, and author of "Disconnect: The Truth About Cell Phone Radiation, What the Industry Has Done to Hide It, and How To Protect Your Family." Davis' book cites studies that point to possible links between cell phones and brain tumors and lower sperm counts.

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