If the candidate does not pass the certification examination, he or she may register to re-take the certification examination online at a price of $395, a discount of $100 from the regular examination rate.
Dengue fever is an infectious disease carried by mosquitoes and caused by any of four related dengue viruses. This disease used to be called break-bone fever because it sometimes causes severe joint and muscle pain that feels like bones are breaking.Health experts have known about dengue fever for more than 200 years.engue fever is an infectious disease carried by mosquitoes and caused by any of four related dengue viruses. This disease used to be called break-bone fever because it sometimes causes severe joint and muscle pain that feels like bones are breaking.
What is dengue fever? Dengue fever is an infectious viral disease caused by the bite  of infected mosquitoes.   Symptoms are sudden onset of high fever, severe headache, extreme  joint pain (â¦ thus the vernacular name, bone break fever).  Note that DF is comparatively rare and rarely fatal when it does  occur..engue fever is an infectious viral disease caused by the bite  of infected mosquitoes.   Symptoms are sudden onset of high fever, severe headache, extreme  joint pain (â¦ thus the vernacular name, bone break fever).  Note that DF is comparatively rare and rarely fatal when it does  occur. .