Zika, a mosquito-borne virus currently spreading across Africa, the Americas, Asia, and the Pacific, has been declared an international public health emergency by the World Health Organization (WHO). The virus is suspected to cause a birth defect known as microcephaly, in which babies are born with small heads, a condition which can cause brain damage, developmental defects, and debilitation. According to WHO, as many as four million people could be infected by the end of the year. The virus has also been linked to neurological syndromes. As these links have been drawn, and the virus continues to spread rapidly, Zika’s risk profile has evolved from “a mild threat” to “one of alarming proportions.”