But in most countries, the survey found a strong sense of progress in treating and preventing H.I.V.Yet finding new drugs and other treatments for public health problems is one thing.

A survey by Sweden's National Institute of Public Health asked how often drinking sessions turned into binges (defined as one person drinking a whole bottle of wine or more).

Glossophobia — better known as a fear of public speaking — affects 74% of people, according to a National Institute of Mental Health survey.