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8 deadly diseases cured by modern science

mosquito, yellow fever

Photo: James Gathany/CDC

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Yellow fever

Transmitted by mosquitoes, yellow fever gets its name from the yellowing of the skin and eyes (or jaundice) that is a symptom of infection. Jaundice is also an indication of liver damage, which can lead to death. Though there is no known treatment for the disease once it is contracted, it can be completely prevented through vaccination. Today it has been eliminated from the United States, but still occurs in tropical South America and Africa. Travelers to these regions are often required to get the vaccine.