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First Lecture detailed notes

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Health Studies
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Caroline Barakat

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Plagues and People May 10 2011 First lecture Whats the impact of diseases on human societies? Aim to understand why diseases occur Humans are effected and what humans do effects the spread of diseases Why is it so hard to control diseases Introduction to Disease (Refer to pg 8, 9 in textbook) Parasite: Using a different host and does not contribute to its survival; cant live on its own and requires a living being for nourishment ,comes from parasitis- Latin word Virus: a collection of genetic material that can cause harm to the host(DNA, RNA), can be seen only through electron microscope(magnified over 10,00 times), ultimate microparasite Micro parasite: composed of many cells, cycles through transmission stages (eggs and larvae), bigger, can be seen through naked eye e.g. roundworms, flies, ticks, Transmission: movement of a parasite from one host to another, infected spoons and drinking cups c
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