Background: Influenza vaccination is the most efficient and cost-effective method to prevent influenza. WHO/CDC recommendations have never considered the effect of previous individual illness on determining future vaccination policy for that individual. Methods: Several Contact networks...

The observation in the 1940s, that children to mothers having rubella in the first part of the pregnancy experienced elevated health risks in later life led to a growing interest into whether fetal exposure to other – less severe - diseases could cause health problems as well. Epidemiological...

This paper uses the 1918 influenza pandemic in Taiwan as a natural experiment to test whether in utero conditions affect long-run developmental outcomes. Combining several historical and current datasets, we find that cohorts in utero during the pandemic are shorter as child/teenagers, less...