Live, work, or travel to regions where yellow fever is common
Do not take preventive steps such as getting a vaccine or protecting yourself against mosquitoes
Symptoms appear within a week after a mosquito bite. The acute phase lasts 3-4 days, then symptoms go away. Some people progress to the toxic phase. This starts within 24 hours of the end of the first phase. Recovery will provide lifetime protection against yellow fever.
Some people may not have symptoms. If they appear, they may include:
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