How serious is Zika?

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We bring together a group of global experts to answer your questions, while the WHO discusses the virus in Geneva. What is the best way to contain it? How worried should the world be? Picture: 3 month old Alice Vitoria Gomes Bezerra who has microcephaly - an abnormally small head - is held by her mother Nadja Cristina Gomes Bezerra in Recife, Brazil. Experts strongly suspect a link between microcephaly and the Zika virus, although it is as yet unproven. Credit: Mario Tama / Getty Images