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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.