title: Henoch-Schölein purpura and polysaccharide meningococcal vaccine.
abstract: BACKGROUND
  We describe here a case of Henoch-Schönlein purpura (HSP) that occurred 10 days after administration of the meningococcal polysaccharide vaccine and came to the attention of a Vaccine Safety Datalink (VSD) investigator (but did not occur in the VSD cohort). Periodic case reports have linked vaccines to HSP.
  
  
  OBJECTIVE
  To better understand the potential risk for HSP after immunization with the meningococcal polysaccharide vaccine.
  
  
  METHODS
  We studied the VSD cohort to estimate the 42-day postvaccination incidence rate of HSP in the VSD population 16 to 20 years of age. Electronic data from all 8 VSD sites were gathered. All subjects aged 16 to 20 years who received a meningococcal polysaccharide vaccine were followed for 42 days after that vaccination for evidence of HSP. Background rates were determined by examining all the nonexposed time of the same cohort.
  
  
  RESULTS
  No cases of HSP were seen in the 42 days after 49,027 doses of meningococcal polysaccharide vaccine among the entire VSD adolescent and young adult population. The background incidence rate was 4.2 per 100,000 person-years.
  
  
  CONCLUSIONS
  These data provide the strongest evidence so far that HSP is not associated with receipt of meningococcal polysaccharide vaccine in the 16- to 20-year age group.
authors.affiliation: University of Utah College of Pharmacy, Salt Lake City, Utah, USA.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Goodman
authors.forename: James D
authors.initials: JD
authors.lastname: Nordin
authors.forename: Edward A
authors.initials: EA
authors.lastname: Belongia
authors.forename: John P
authors.initials: JP
authors.lastname: Mullooly
authors.forename: James
authors.initials: J
authors.lastname: Baggs
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D011695:IgA Vasculitis / Q000139:chemically induced* / Q000453:epidemiology*; D015994:Incidence; D008297:Male; D022401:Meningococcal Vaccines / Q000009:adverse effects*; D013997:Time Factors; D055815:Young Adult
chemical_list: D022401:Meningococcal Vaccines