Since hepatitis means inflammation of the liver and dengue fever can cause all kinds of havoc in the body and death, I am not surprised.
In Jakarta, where I used to live, there usually are bigger outbreaks around ever 5 years. The hospitals are so crowded that patients have to lie in the corridors etc. Many ppl die, because they are admitted too late.
Just a few days before Christmas, when my son was still in Indonesia, he got sick and had all the symptoms. He had to have his blood checked twice to make sure it wasn't dengue. I was a bit nervous, I must say. Fortunately it wasn't that and he was able to come home.
btw, he was also tested for cikungunya, as they have the same symptoms. The mosquito does not spread the actual hepatitis, but dengue which can result in hepatitis.