This tool can be used to visualize sex and age composition of a particular population. It is also used in ecology to determine the overall age distribution of a population; an indication of the reproductive capabilities and likelihood of the continuation of a species. Population pyramid often contains continuous stacked-histogram bars.
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.
Children with hand-foot-mouth disease usually start to feel crummy 3 to 7 days after they were exposed. Often, the first thing parents notice is their childrenâs decreased appetite for solids. Children may also have a fever and a sore throat. A day or two later, many children develop sores in the mouth.imilar-sounding âfoot-and-mouth diseaseâ is a disease of cattle and is not related to this condition. Hand-foot-mouth disease is usually caused by a virus called coxsackievirus A16. However, many children with coxsackievirus A16 infections do not have all of the features of hand-foot-mouth disease.