Over 27k cases of dengue, I assume this year, although the report fails to give a time frame. Does anyone know which is the prevalent strain? Is it DENV 1, 2, 3 or 4? I had DENV 2 about 10 years ago so I believe I'm immune to that particular strain but not to the other 3. Moreover I understand that having recovered from one strain, if you then get one of the other strains you will be more seriously affected than if you'd never had dengue before.