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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Medication errors are more common among seriously ill patients than with those with minor conditions.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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).

