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Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
The longest a person has survived after a heart transplant is 24 years.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.