The yellow fever virus and the mosquitoes that transmit it are found in certain parts of South America and Africa, putting travelers to these areas at risk of infection. Some countries may require arriving travelers to show proof of yellow fever vaccination as a public health measure to prevent the virus from being imported. The Centers for Disease Control and Prevention (CDC) makes recommendations on the yellow fever vaccine for travelers going to countries where there is a risk of contracting the virus. A single dose of the vaccine is usually enough to provide lifelong protection, but some travelers may be recommended a booster dose after 10 years.
Before getting vaccinated, it is essential to discuss your complete medical history with a healthcare provider, as the vaccine can have serious and sometimes fatal side effects. People over 60 years of age and those with weakened immune systems may be at greater risk of experiencing these side effects. There is also concern for the babies of pregnant and breastfeeding women who receive the yellow fever vaccine. In addition to individual country requirements, other countries may also require the yellow fever vaccine depending on the country you are traveling from or to which you have recently traveled.
If you feel unwell after a trip, especially if you have a fever, talk to a healthcare provider and tell them about your journey.
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