Spanish flu epidemic in 1918 in Geneva, Switzerland.

In Geneva, Switzerland, the Spanish flu epidemic affected more than 50% of the population. The mortality was higher among those aged between 20-49 years and among men. The socioeconomic impact was very important, as the outbreak led to severe dysfunctions, including in health services. This epidemic shows the socio-economical burden that may be associated with influenza and highlights the need for pandemic preparedness.