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.
A fever and sore throat are usually the first symptoms of hand, foot, and mouth disease. The characteristic blisters and rashes show up later, usually one or two days after the fever begins. Hand, foot, and mouth disease is often caused by a strain of coxsackievirus, most commonly coxsackievirus A16. The coxsackievirus is part of a group of viruses called Enteroviruses. In some cases, other types of Enteroviruses can cause hand, foot, and mouth disease. Viruses can be easily spread from person-to-person.