11:375:101 Lecture Notes - Lecture 19: Precautionary Principle, Overeating, Toxicant
5 Dec 2017
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Probability of suffering harm from a hazard. Deciding whether and how to reduce a particular risk. Ex. if it is rare, if reducing it will lead to less enjoyment, etc. We often fear less likely things more than more likely things. Pathogen: an organism that causes disease in other organisms. Diarrheal diseases (ex. cholera and many others. Some diseases can spread from one person to another. Flu and pneumonia: 3. 2 million deaths per year. Hiv and aids: 1. 7 million deaths per year. Spread to asia, europe, and north and south america. Took only 1 week to travel to 17 countries. In 1900, infectious diseases were the leading cause of death in the world. People have voluntarily not been getting vaccinations as much. A group of bacteria, including genetically resistant ones, are exposed to an antibiotic. But, the genetically resistant bacteria start multiplying. Eventually the resistant strain replaces the strain affected by the antibiotic.
