title: H1N1 outbreak in a Swiss military boot camp--observations and suggestions.
abstract: OBJECTIVE
  The A(H1N1)pdm09 influenza virus is a highly contagious pathogen which caused the 2009 influenza pandemic. The virus is known to affect mainly younger people and may be a problem in crowded living conditions. The aim of the study was to describe a major A(H1N1)pdm09 outbreak in a Swiss military boot camp and to develop suggestions for similar future situations.
  
  
  METHODS
  Retrospective chart analysis of a A(H1N1)pdm09 outbreak between 14 December and 23 December 2010. Symptoms, signs and lab parameters were documented.
  
  
  RESULTS
  105 of 750 male recruits were affected by the outbreak. All nasopharyngeal swabs of 16 patients with high fever were tested positive. Common clinical symptoms included high fever, myalgia and bronchitis with persistent cough and throat aches. Fever progression typically occurred in two peaks within three days. Median length of stay at the infirmary was 3 days (range: 0.5-9 days).
  
  
  CONCLUSIONS
  A(H1N1)pdm09 has become a ubiquitous seasonal virus in the region. Complications were uncommon and non life threatening. In the event of new influenza outbreaks, hygienic and containment measures must be quickly and correctly implemented, in order to avoid an epidemic. This should also be considered in non-military settings like school camps or in retirement homes.
authors.affiliation: Medical Corps, Swiss Armed Forces, Switzerland. victor.jeger[at]insel.ch
authors.forename: Victor
authors.initials: V
authors.lastname: Jeger
authors.forename: Alexandro
authors.initials: A
authors.lastname: Dünki
authors.forename: Marco
authors.initials: M
authors.lastname: Germann
authors.forename: Christoph Andreas
authors.initials: CA
authors.lastname: Fux
authors.forename: Alexander
authors.initials: A
authors.lastname: Faas
authors.forename: Aristomenis K
authors.initials: AK
authors.lastname: Exadaktylos
authors.forename: Andreas
authors.initials: A
authors.lastname: Stettbacher
mesh_terms: D000293:Adolescent; D004196:Disease Outbreaks; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control / Q000821:virology; D008297:Male; D008889:Military Personnel / Q000706:statistics & numerical data*; D009305:Nasopharynx / Q000821:virology; D012189:Retrospective Studies; D013557:Switzerland / Q000453:epidemiology; D055815:Young Adult