Medicine: Hucksters for Health

Redhaired, crew-cut Billy Newell, 6, was having the time of his life. First he picked up a foot-long toothbrush and used it to clean an oversized set of false teeth, following instructions on proper brushing procedures supplied by a dental technician. Then he tried to apply the same technique on his own teeth. Using a regular child's toothbrush, he began brushing vigorously, trying to remove every trace of a sweet red wafer handed him a moment before by the technician. "It tastes like candy!" he yelled to a screaming crowd of balloon-carrying children, as...

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