The rise of the anti-vaccination movement has brought old diseases back into public consciousness. Whooping cough, measles, and rubella are all renewed concerns. The rise of vermin in large cities such as Los Angeles and New York City have also caused the resurgence of other, more severe diseases such as the bubonic plague, typhus, and typhoid fever. The latter, in particular, was once a serious problem in the United States. While still dangerous, it has become less common in developed countries.
Typhoid fever is a life-threatening illness caused by a bacteria of the Salmonella genus, Salmonella Typhi or S. Typhi. It is estimated to affect more than 20 million people per year but is most common in developing countries such as India and Pakistan.
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