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.
1 Hand, foot and mouth disease is caused by a virus (usually Coxsackie virus A16). 2  It causes blisters on the hands, feet, in the mouth. 3  Blisters can also be in the nappy area of young children.4  Hand, foot and mouth disease can be caused by several other viruses. The fever can be high, but often is mild. 2  Blisters on the hands and feet, and ulcers or blisters in the mouth appear 1-2 days after the first symptoms and may last for 2 â 7 days.