How many times a person can have dengue?

A person can contract dengue fever multiple times, as there are four distinct serotypes of the dengue virus (DEN-1, DEN-2, DEN-3, and DEN-4). Infection with one serotype typically provides lifelong immunity to that specific type, but not to the others. Subsequent infections with different serotypes can occur and may increase the risk of severe dengue. Therefore, it's possible to have dengue fever up to four times in a lifetime, once for each serotype.