The bacteria that cause typhoid fever live almost exclusively in sewage, and typhoid remains a major problem in Asia, Africa and parts of South America. In countries where water supplies are kept free from sewage contamination and where food handlers follow the basic rules of cleanliness, typhoid is a rare disease. When it erupts in a place that prides itself on good sanitation, as it did in the Swiss ski resort of Zermatt 18 months ago, it causes a violent flap. Last week there was a new typhoid flap in clean Aberdeen, Scotland (pop. 186,000). There were 324 confirmed...
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