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Medicine Facts

What Is High Blood Pressure?

High blood pressure is a blood pressure reading of 140/90 mmHg or higher. Both numbers are important. About one in every four American adults has high blood pressure. Once high blood pressure ... Continue reading

The Plague

Plague is an infectious disease caused by the bacterium Yersinia pestis. The bacterium is found mainly in rodents, particularly rats, and in the fleas that feed on them. Other animals and humans ... Continue reading

Prairie dogs sometimes carry plague.

The Placebo Effect

To test new drugs, researchers usually divide their subjects into two groups. One group receives the experimental drug. The other receives a placebo or 'sugar pill' that should have no effect on the ... Continue reading

Which of these pills is the real thing?

Your Friend, the Fat Cell

A healthy, adult human body contains about 35 billion fat cells. Each contains about 0.5 micrograms of fat. Stored fat is essential to good health. Fat is the body's principal energy reserve. It is ... Continue reading

Mature fat cells filled with fat.