I imagine dengue is low on the list as the dry season is here, but it may reappear. Dengue is, unlike malaria, transmitted by day-biting mozzies, and tends to be associated with populations of people when rains occur and water can collect in potholes, utensils left out, etc. Darker clothing attracts mosquitoes, and repellents are suggested (the US CDC recommends DEET or lemon eucalyptus oil as the two best, and anything over 30% is overkill.)

Generally speaking, dengue is not fatal (unless it turns into the occasional and rare case of dengue hemorrhagic fever,) but in the old days it was called "breakbone fever" - for very good reason.

I picked up a case of dengue 2 - 3 years ago exploring some Maya ruins near Chetumal - stupid me was wearing a black tee shirt, I was covered with mozzies; my friend was wearing white, he had a few mozzies parked on his tee shirt. There's no cure... no vaccine... and plenty of not feeling good. Much easier to avoid it.