Sellers at Tesco are third party sellers we have invited to sell on Tesco direct. These are companies we’ve selected to provide you with a wider range of products to choose from in one place. They are a mixture of well-known high street retailers and specialist retailers who operate online. Plus, you earn Clubcard points on all seller orders.
Seller deliveries & returns
Delivery times and costs vary by seller - further details are shown on the product pages and at checkout.
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The delivery and return of seller items is managed by each seller. For further details, or if you have a question about the delivery or return of a seller product, please use the Seller directory to find the seller’s ‘help’ page.
What is epidemiology? What are the causes of a new disease? How can pandemics be prevented? Epidemiology is the study of the changing patterns of disease and its main aim is to improve the health of populations. It's a vital field, central to the health of society, to the identification of causes of disease, and to their management and prevention. Epidemiology has had an impact on many areas of medicine; from discovering the relationship between tobacco smoking and lung cancer, to the origin and spread of new epidemics. However, it is often poorly understood, largely due to misrepresentations in the media. In this Very Short Introduction Rodolfo Saracci dispels some of the myths surrounding the study of epidemiology. He provides a general explanation of the principles behind clinical trials, and explains the nature of basic statistics concerning disease. He also looks at the ethical and political issues related to obtaining and using information concerning patients, and trials involving placebos. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.