In this issue, we get to grips with the greasy world of fats and lipids to find out what they do, not just inside us and other organisms but also in the world around us.
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This week is World Immunisation Week. Many gains have been made in vaccination across the globe, but there is still more to do in order to meet world vaccination targets by 2020. In this article, we look at how vaccines are given, why we need different vaccines for different age groups and how needing to keep vaccines cold is a challenge to overcome in some low- and middle-income countries.
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Each issue of 'Big Picture' comes with a sprinkling of Fast Facts, fascinating snippets of information on the topic covered.