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.
Signs that your child might have a more serious form of hand, foot and mouth disease include any of the following: 1  persistent fever (38Â°C or above for 72 hours or more) 2  abnormal movements/jerking movements. 3  rapid breathing. 4  excessive tiredness, drowsiness. 5  excessive irritability. 6  difficulty walking.