Yellow fever is a virus spread by mosquitos and is found in many parts of South America. In many countries, yellow fever is now the only vaccine that is a legal entry requirement, but is usually only enforced with travellers coming from infected areas. The vaccination is very effective, and one injection lasts for ten years. It is highly recommended for anyone who wishes to travel in or around South America. The vaccination may pose some risk during pregnancy, but is still advisable for women travelling to high-risk areas. People allergic to eggs may not be able to have the vaccination and this should be discussed with your doctor.

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