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Experts say adding the varicella vaccine to the official NHS childhood immunisation programme will dramatically reduce the number of people who catch chickenpox, leading to far fewer serious cases.，这一点在safew官方下载中也有详细论述
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Madeleine Finlay sits down with science editor Ian Sample and science correspondent Nicola Davis to discuss three eye-catching stories, including the impact of a powerful psychedelic on depression, answers on the death of Russian opposition leader Alexei Navalny, and an explanation to the mystery of why humans have chins