A Study of CP-COV03 Compared With Placebo in Participants With Dengue (Part 1) and Dengue-like Illness (Part 2)

Inclusion Criteria: * Patients who are 18 years or over of age at time of screening. * Patients who have at least two symptoms with a score of 2 or higher within 72 h from fever onset. * Patients who are diagnosed with dengue by NS1 positive (Phase 2- Part 1 only). And patients who are classified as dengue, zika, influenza, COVID-19 and others (Phase 3- Part 2 only) Exclusion Criteria: * Patients who show severe dengue (WHO dengue guideline C, any severe symptoms or clinical laboratory results) * Patients who have previously received dengue vaccine * Patients who have chronic medical conditions such as uncontrolled diabetes mellitus, severe asthma requiring oral steroids or admission to the hospital in the previous 6 months for cardiac disease