Yellow fever

  • Yellow fever ranges in severity from non-specific, self-limited symptoms of fever, malaise, photophobia and headache to an illness of sudden onset with fever, vomiting and prostration which may progress to jaundice and haemorrhage
  • The incubation period is generally three to six days but may be longer
  • Death usually occurs seven to ten days after the onset of illness. Infection results in lifelong immunity in those who recover
  • Increased risk of serious adverse events following a first dose of yellow fever vaccine in those over 60 years (Gershman MD and Staples JE, 2018) is an acute flavivirus infection spread by the bite of an infected mosquito