LONDON (Reuters) - The world is once again asking scientists and drugmakers to come up rapidly with a vaccine for a viral disease that, in the latest case, few people had heard of until a few weeks ago, and even fewer feared.
Making a shot to generate an immune response against Zika virus, which is sweeping through the Americas, shouldn't be too hard in theory. However, producing a safe, effective and deliverable product to protect women and girls who are at risk is not easy in practice.
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