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.
What is Hand, Foot, and Mouth Disease? Hand, Foot, and Mouth Disease (HFM) is a common childhood illness caused by a virus and marked by painful mouth sores. Symptoms may include blisters in the mouth and small, grayish red blisters on the palms of the hands, the soles of the feet, and sometimes on the buttocks.