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.
Causes and symptoms of hand, foot and mouth disease. The infection is commonly caused by Coxsackie A16 strain of virus from the enterovirus family. The infection leads to symptoms of fever, sore throat, skin rashes over hands, feet, buttocks, genitalia and also leads to ulcers in the mouth, throat, tonsils and tongue. (1-8)