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The longest a person has survived after a heart transplant is 24 years.
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
![Female individuals of the banded Uromastyx, Uromastyx flavofasciata, are different colours. Most nat](https://biology-forums.com/gallery/47/medium_33_22_09_11_9_37_27_18101556.jpeg)
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