the World Health Organization

The work is dirty, dangerous ... and thankless.

Sanitation workers in lower income countries often endure grueling conditions to perform a service that's vital to keeping their communities healthy. Yet their suffering has largely gone ignored — even by advocates for the poor.

The World Health Organization announced Friday that it no longer considers the Zika epidemic a public health emergency of international concern.

But Zika's threat to pregnant women and babies is not going away anytime soon, the agency says. Instead, the virus is now a chronic problem, says the WHO's Dr. Pete Salama.

The controversial “yoga mat” chemical can be found in nearly 500 food products ranging from bread to stuffing and snacks, according to a list released by the Environmental Working Group.