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 is an illness caused by a virus that results in a distinctive rash. It causes small, blister-like bumps in the mouth, and a rash on the palms of the hands and feet. The rash may also appear in the diaper area and on the legs and arms. The lesions in the mouth usually appear at the back of the throat.