There are four strains. If only one is common in Indonesia, then you're right - once through is more or less like the flu. In Puerto Rico there are three stra

There are four strains. If only one is common in Indonesia, then you're right - once through is more or less like the flu. In Puerto Rico there are three strains endemic. The more different strains you get, the worse the disease (i.e the worse your systemic reaction). One of my son's classmates died last year of it, in Ponce, Puerto Rico (about a year after we left PR) - he was home from the hospital, posted to Facebook "I'm not 100% yet but feeling much better", and died that night. He was 11. Dengue sucks.