A population pyramid, also called an age pyramid or age picture is a graphical illustration that shows the distribution of various age groups in a population (typically that of a country or region of the world), which forms the shape of a pyramid when the population is growing.
Hand, Foot, and Mouth Disease Symptoms & Signs. The symptoms of hand, foot, and mouth disease are typically mild and occur mainly in children during the spring and fall seasons. Symptoms can include fever, malaise, decreased appetite, and sore throat. A rash is characteristic of this viral disease.
Mouth sores may make it difficult to eat and drink. A rash consisting of red spots or blisters appears on the soles of the feet and palms of the hands. Pain relievers and mouth numbing sprays may be used to relieve symptoms of hand-foot-and-mouth disease. The illness is usually benign and resolves on its own.