if we off piste as it were , even 40km from Puerto to the nagtabong beach area it is possible to get dengue and it is only 10km off the highway. one of our dutch friends 9 yr old boys got a nasty bout. just need to be aware and have plenty of OFF and some coils in the early evening for the beach hut/kubo. and light weight trousers, I use my old gym trousers made of a sort of sarong type material.