The World Health Organization declares the Zika virus to be a global health emergency as the disease linked to thousands of birth defects in Brazil spreads .
The World Health Organization took a rare step Monday and declared the Zika virus an international public health emergency. The virus is transmitted by .
The World Health Organization has declared the spread of the Zika virus in the Americas to be a global health emergency, calling for a coordinated international .
The World Health Organization has declared the mosquito-borne Zika virus to be an international public health emergency as the disease linked to thousands of .
