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.
Hand, foot, and mouth disease (HFMD) is a highly contagious disease caused by several enteroviruses. These viruses are transmitted via nasal secretions, kissing, and saliva. HFMD causes the following symptoms and signs: decreased appetite, sore throat, fever, weakness, and painful sores on the hands, feet, and in the mouth.