No, the booster dose for the dengue fever is not usually needed unless if you have week immune system or travelling to places that are high risk of dengue. By getting vaccinated for second time provides long term protection up to 4.5 years. Please don’t hesitate to visit your local Touchwood Pharmacy in Northampton (NN2,NN7,NN5,Rugby,Corby,Kettering) to get expert gudicance or to receive your vaccination.