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Table 2 Comparison of descriptive characteristics of symptomatic and asymptomatic WNV+ subjects

From: Enhancement of Zika virus infection by antibodies from West Nile virus seropositive individuals with no history of clinical infection

  Symptomatic WNV+ subjects Asymptomatic WNV+ subjects
  No. (n = 19a) % No.(n = 28) % p-value
Gender Male 11 57.9% 19 67.9% 0.5462
Female 8 42.1% 9 32.1%
Age (years) < 50 3 15.8% 15 53.6% 0.0140
≥50 16 84.2% 13 46.4%
Race Hispanic 10 52.6% 26 92.9% ND
White 8 42.1% 2 7.1%
Black 0 0.0% 0 0.0%
Asian 0 0.0% 0 0.0%
Otherb 1 5.3% 0 0.0%
  1. a20 patients were referred from the public health department with a previous history of WNV diagnosis
  2. bOther: includes mixed races and those who chose not to respond
  3. p-value was determined using the Fisher exact test. ND-Not determined
  4. However, only 19 tested positive in WNV E IgG ELISA