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. This common illness is caused by a group of viruses known as enteroviruses. Coxsackievirus A16 is the enterovirus responsible for most cases of hand-foot-and-mouth disease. The illness occurs most commonly in babies and children under the age of 5, but adults may be affected, too. Fever, sore throat, reduced appetite, and malaise are early symptoms of infection.