based on previously published studies. Out of multiple other demographic and illness-related factors assessed, only having a secondary dengue infection was associated with a high risk of DHF (RR=3.077,95% CI 1.361, 6.954) Conclusion Persistent NS1 positivity on day three and beyond may not be indicative of disease severity. However, results need to be confirmed by a larger study with quantitative NS1 testing.
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