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*WHO suggests case definitions to survey YF with '''suspected case ''' as ''Any person with acute onset of fever, with jaundice appearing within 14 days of onset of the first symptoms''.
{{quote|content=
World Health Organization. (2022). Yellow Fever Outbreak Toolbox. https://www.who.int/emergencies/outbreak-toolkit/disease-outbreak-toolboxes/yellow-fever-outbreak-toolbox
*A mathematical estimation using Bayesian model showed probability of asymptomatic '''infection''', '''mild disease ''' and '''severe disease ''' as '''55%''', '''33% ''' and '''12%''', respectively, as well as '''case fatality rate among severe disease ''' as '''47%''', but the 11 studies authors collected for the study were highly heterogeneous.
{{quote
|content=Johansson, M. A., Vasconcelos, P. F. C., & Staples, J. E. (2014). The whole iceberg: Estimating the incidence of yellow fever virus infection from the number of severe cases. Transactions of the Royal Society of Tropical Medicine and Hygiene, 108(8), 482–487. https://doi.org/10.1093/trstmh/tru092
*A systematic review and meta-analysis concluded from 14 articles that '''case fatality rate of YF among severe disease ''' is '''39% ''' (95%CI 31-47).
{{quote
|content=Servadio, J. L., Muñoz-Zanzi, C., & Convertino, M. (2021). Estimating case fatality risk of severe Yellow Fever cases: systematic literature review and meta-analysis. BMC Infectious Diseases, 21(1), 1–12. https://doi.org/10.1186/s12879-021-06535-4
