[Sex workers and public health: intersections, vulnerabilities and resistance].

Since the 19th century with syphilis and most recently with AIDS, sex workers have been seen as a means for disease transmission and a public health problem that requires intervention. However, researchers have shown that in Western countries, HIV rates in people involved in commercial sex are low, except for in specific groups, such as intravenous drug users. Moreover, the risks faced by sex workers due to stigmatization and other forms of violence have been put into evidence. Based on an urban ethnography with street sex workers carried out in Porto (Portugal), between 2004 and 2005, this article discusses the social, labor, and legal vulnerabilities affecting people involved in commercial sex and how these interfere with their health. Focus is placed on the strategies used by sex workers to minimize health risks and their discourses of resistance in fighting vulnerabilities.