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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.