Travel-related influenza A/H1N1 infection at a rock festival in Hungary: one virus may hide another one.

摘要

Mass gathering is well known to concentrate and amplify the transmission of infectious respiratory diseases. Here we report a possible case of coinfection with influenza A/H1N1 and varicella in a young French traveler returning from a rock festival in Hungary. We report a cluster of influenza A/H1N1 cases at this festival.