UN body acts over mosquito-borne virus linked to serious birth defects which is ‘spreading explosively’ across the Americas Nadja Cristina Gomes Bezerra holds her three-month-old daughter, Alice Vitoria, who has microcephaly. Photograph: Mario Tama/Getty Images The World Health Organisation has declared a “public health emergency of international concern” due to the apparent link of the Zika virus to a surge …