Causes. Fungal nail infections are caused by various fungal organisms (fungi). The most common cause is a type of fungus called dermatophyte. Yeast and molds also can cause nail infections. Fungal nail infection can develop in people at any age, but it's more common in older adults. As the nail ages, it can become brittle and dry.
Photo: Getty Images. Jan. 1 marked a significant cultural shift in China â starting this year, families will be able to have two children. This alters the one-child policy that was introduced in 1978 to control the countryâs population.
China recently announced the end of its one-child policyâhereâs why thatâs a big deal for the country and what it says about the rest of the world. Beginning in 2016, many couples in China will be allowed to have another child. But changing the one-child policy may not entirely resolve the country's demographic issues. China's decision to lift its one-child policy next year is expected to diversify the countryâs aging, increasingly male population. But the degree to which the policy has affected the country of more than 1.3 billion people is hard to imagine. Here are five charts and maps that help illustrate it.