False negatives are common when testing on the first week of symptoms. But after 1-2 weeks serology testing is accurate. My 1st exam was negative and the 2nd (a

False negatives are common when testing on the first week of symptoms. But after 1-2 weeks serology testing is accurate. My 1st exam was negative and the 2nd (after 2 weeks) was positive. There are other viruses with symptoms similar to Dengue like Zika and Chikungunya.