Yellow Fever Cure: An Overview. Once a person has become infected, there is only one yellow fever cure: time. Therefore, current yellow fever treatment goals are focused on providing relief of symptoms as the body fights the yellow fever virus. In most cases, the body can effectively kill the virus.he yellow fever vaccine is a live-virus vaccine that has been used for several decades. A single dose provides protection for 10 years or more. If a person is at continued risk for yellow fever infection, a booster dose is needed every 10 years.