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Table 2 Relation of infection with headache

From: Post-infectious headache: a reactive headache?

Parameters Headache preceded by infection (n = 23)
Type of illness
 Specific illness
  Dengue 2
  H1N1 2
  Salmonella typhi 1
 Non specific
  Rhinitis 8
  Pharyngitis 7
  Gastroenteritis 3
Time interval with headache onset (weeks)
 <1 8
 1–2 7
 2–3 6
 3–4 2