The vaccine for yellow fever is valid till:
17D vaccine is the recommended vaccine for yellow fever. It is a live attenuated vaccine which is prepared from a nonvirulent strain. It is administered subcutaneously at the insertion of deltoid in a single dose of 0.5 ml. Immunity begins to appear on the 7th day and lasts for more than 35 years. However. World Health Organization recommends revaccination after 10 years for international travel.