This vaccine offers protection for travelers to endemic areas who are at risk of getting bit like animal control people, biologists and spelunkers. It prolongs the time between the actual animal bite and the eventual side effects allowing you more time to reach a hospital. Three injections over three weeks. One of the few required vaccines in some countries. You may need it to go from one country to another - especially if that country has that illness present.
Yellow fever is a viral illness spread by mosquitoes in parts of Africa and South America.
The vaccine is given by injection and lasts for approximately ten years. Minor reactions like pain at the injection site are the norm. This is an infection of the bloodstream by a parasite that is transmitted by the Anopheles mosquito after it bites you. Hydration is very important. Anyone coming back from the tropics with a fever should assume it is malaria until proven otherwise.