Dengvaxia is available in some countries for vaccination and had some safety issues post marketing. ICMR has developed and has done trials on a tetravalent dengue vaccine which is supposed to release soon.
There are several types of eczema most of them cause dark coloured patches on the skin. Crusting and oozing of the area may be present. Swelling associated with rough scaly patches.
Small, red pinhead likenrashes which seem to be deeply embedded in skin. The rash cannot be felt by running our hand across it.
There could be multiple reasons for whole body itching. One could be you are allergic to some food or medications(allergic skin reaction) .Other reasons could be dry skin, hives, bug bites, scabies, eczema.
Whenever there is a mosquito bite and spread of the Dengue virus, there is a chance of Dengue infection. There is no life-long immunity post first infection