Understanding and precisely assessing the IgM and IgG antibody indices in the test can assist clinicians in accurately diagnosing dengue fever and treating it quickly and effectively.

Dengue fever is a common disease during the rainy season, which provides ideal conditions for mosquito reproduction and development. On the other hand, Dengue fever can occur all year in Vietnam due to its tropical monsoon climate. The disease can be life-threatening although it is easy to mistake it for a normal cold if the symptoms of dengue fever with rash do not show on the skin. So, why are certain cases of dengue fever without a rash?