| comparison of two strategies to prevent varicella outbreaks in housing facilities for asylum seekers. | background: the proportion of adults with positive varicella serology is lower in populations from tropical countries. therefore immigrants to countries with a temperate climate are at risk of acquiring varicella infection during adulthood. methods: we tested two different strategies to prevent varicella outbreaks in housing facilities for asylum seekers arriving in the canton of vaud, switzerland. the first strategy consisted of a rapid response with isolation of the affected individuals and va ... | 2011 | 21802330 |