Choices regarding prenatal diagnosis of Down syndrome - the most frequent chromosomal defect - are particularly relevant to decision analysis, since women's decisions are based on the assessment of their risk of carrying a child with Down syndrome, and involve tradeoffs (giving birth to an...

In 2009–2010, the H1N1 episode occurred in a general context of decreasing public confidence in vaccination. We assumed opposition to vaccination in general to be an ‘unfounded fear’, reflecting ignorance and perceived vulnerability among low-socioeconomic status (SES) people, and...

The ANRS-EN12-VESPA 2003 survey interviewed a national, representative sample of the HIV-positive population attending hospital outpatient services. Conducting the survey in a hospital made it easier to identify and contact HIV-positive patients, but involved various biases : the role of the...