Definitions. 1  Age distribution > Population aged 0-14: Percentage of total population aged 0-14. 2  Age structure > 0-14 years: The distribution of the population according to age. 3  Birth rate: The average annual number of births during a year per 1,000 persons in the population at midyear; also known as crude birth rate.
Hand-foot-and-mouth disease, or HFMD, is caused by a virus. Symptoms include ulcers, or sores, inside or around the mouth, and a rash or blisters on the hands, feet, legs, or buttocks. And while it's not pleasant, it also isn't serious. Anyone can get the disease, but children under age 10 are most likely to catch it.
Images of Hand-Foot-and-Mouth Disease. Overview. Hand-foot-and-mouth disease is a suddenly appearing (acute), self-limited viral disease caused by viruses of the enterovirus group, particularly Coxsackievirus A16. The development (incubation) period from infection to symptoms is short, from 3â6 days.