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.
Hand-foot-and-mouth disease is a viral infection most often seen in infants and children younger than 10 years. It is most commonly caused by coxsackievirus A16. Coxsackieviruses are one type of enterovirus. Despite the similarity in names, hand-foot-and-mouth disease is a completely different infection than foot-and-mouth disease, which occurs only in animals and is caused by another type of virus.