There is "accumulating evidence" of a link between the Zika virus and two neurological disorders, microcephaly and Guillain-Barre syndrome, a senior World Health Organization official said on Friday.

Dr. Bruce Aylward, WHO Executive Director for Outbreaks and Health Emergencies, said that recently published studies in the Lancet on microcephaly and by the U.S. Centers for Disease Control (CDC) on Guillain-Barre had strengthened the case that the mosquito-borne Zika virus is responsible.

"Since the public health emergency of international concern was declared (by WHO) back in February, the evidence that there may be a causal relationship has continued to accumulate," Aylward told a news briefing in Geneva.

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