title: Safety of 17D derived yellow fever vaccines.
abstract: BACKGROUND
  Yellow fever, a mosquito-borne viral haemorrhagic fever, is one of the most lethal viral diseases. At present, an efficient vaccine for prevention is available, but may cause serious adverse events.
  
  
  METHODS
  The authors review the up-to-date knowledge for serious adverse events of the yellow fever vaccine (YFSAE): hypersensitivity reactions, neurotropic and viscerotropic syndromes.
  
  
  RESULTS
  The incidence of YFSAE has been associated with increasing age and thymus disorders, but still a number of cases with any risk factor remain unexplained, which suggests that other factors, from the virus or the host, could be involved in the appearance of these postvaccinal adverse events.
  
  
  CONCLUSIONS
  YFSAE are uncommon but must be prevented. Further research on the virus-host immune response is needed to have a better understanding of the basis for the appearance of these severe side effects after vaccination. Vaccination should be limited to people with a true risk of exposure to wild-type yellow fever virus.
authors.affiliation: Robert Koch Institut, Centre for Biological Safety, Berlin, Germany.
authors.forename: Cristina
authors.initials: C
authors.lastname: Domingo
authors.forename: Matthias
authors.initials: M
authors.lastname: Niedrig
mesh_terms: D006801:Humans; D006967:Hypersensitivity / Q000209:etiology*; D012307:Risk Factors; D014611:Vaccination / Q000009:adverse effects*; D014613:Vaccines, Attenuated / Q000009:adverse effects; D015004:Yellow Fever / Q000517:prevention & control*; D022341:Yellow Fever Vaccine / Q000009:adverse effects*
chemical_list: D014613:Vaccines, Attenuated; D022341:Yellow Fever Vaccine