Do different dengue strains exist, and can I get dengue twice in the same season?

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There are four different dengue strains, and the fifth one was discovered recently. So you can get infected with different dengue strains. However, it is an infrequent phenomenon as one strain is usually seen in one area, and other strains are generally absent. So theoretically, it is possible but practically not. However, there are a few more illnesses that resemble dengue. They are scrub typhus, leptospirosis, etc. The treatment for all of them is different. So there is a need to establish a definite diagnosis before starting treatment. I hope this helps. Kindly revert in case of further queries.