The new 5G cell-phone network promises to be the most powerful and fastest of all time. But with that extra speed comes extra risks. To put that into perspective, there were about , antennas in and half as many in Recently, Sprint stopped operating a cell tower in a California school yard after four students and three teachers there developed rare cancers in the 10 years since the tower was erected. With 5G, these risks may only worsen. The US National Toxicology Program, considered the industry gold standard for this kind of testing, reported clear evidence of rare cancers and genetic damage in animals after prolonged exposure to 2G and 3G radiation.