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. 2016 May 31;11(5):e0156376. doi: 10.1371/journal.pone.0156376

Table 1. General characteristics of 233 included primary research publications.

Category Count
Type of citation
  Primary peer-reviewed 149
Grey literature with primary data 72
Conference proceeding 11
Thesis 1
Language
English 212
  French 21
Continent
Central America/South America/Caribbean 64
  Australasia 58
  Africa 56
  Europe 25
  Asia 20
  North America 17
Date of publication
  Pre 1960 11
  1960–1970 8
  1971–1980 18
  1981–1990 10
  1991–2000 7
  2001–2010 9
  2011-Present 170
ZIKV topic category
Epidemiology 132
  Pathogenesis 89
Virus study 43
  Surveillance 13
  Diagnostic tests 12
  Vector study 12
  Transmission 10
  Mitigation 3
  Qualitative 1
  Other model 1
Study design
  Observational study 209
Outbreak investigation 67
  Case study or case-series 62
  Prevalence survey 48
  Surveillance or monitoring program 14
  Cross-sectional 7
  diagnostic test evaluation 7
Molecular epidemiology 6
  Longitudinal study 1
  Case control 1
  Experimental study 24
  Challenge trial 22
  Controlled trial 2
Vector mapping model 2