Don't worry.
Dengue fever is just like any other viral illness which subsides on its own. You just need to be careful of its warning signs, platelet count and should drink plenty of fluids.
You may read this article
"Dengue Fever : Don't Panic, Know How to Deal With It" by Pratyush kumar mishra - https://www.practo.com/healthfeed/dengue-fever-don-t-panic-know-how-to-deal-with-it-29261/post
Next Steps
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