Heard from my contact in Papua New Guinea.  He is recovering from dengue fever. This his second round with this fever.  As of right now there is no preventive medicine you and take to prevent this.  It is another mosquito borne virus that attacks humans.  Since I will be traveling a couple of days through this hot spot of dengue fever I will have to be very cautious and prepare as much as possible to prevent the mosquitoes biting.  This like repellant, long sleeve shirts, gloves, everything that makes wearing them in the high heat and humidity miserable.  Fortunately my main time will be up in the mountains and the mosquito is not a problem.