From AFP, via INQUIRER.net:
While only about 4,000 people have severe skeletal fluorosis, said Ma, a look around in Zhijin reveals that residents as young as six have decaying teeth that are severely discoloured and other signs of the disease.
Nationwide more than 2.8 million have some form of skeletal fluorosis, according to data published in 2005 by China’s national health ministry.
The condition is so common in rural China, where 800 million of the nation’s 1.3 billion people live, that the health ministry estimates that 100 million are at risk. [Full Text]