<s>[INST] Can Dengue Fever Occur To The Same Person Twice? [/INST] Yes, a person can be infected with Dengue multiple times, as there are four different serotypes of the Dengue virus (DENV-1, DENV-2, DENV-3, and DENV-4).

Each serotype can cause the disease, and previous infection with one serotype does not provide complete immunity against the others. Some reinfections can result in more severe forms of the disease, particularly with the D2 strain, which is associated with symptoms like Dengue Hemorrhagic Fever and Dengue Shock Syndrome.

Immune complications may also occur in some cases, making reinfections more severe. Source: DR. MEHTA'S HOSPITAL. Link: https://mehtahospital.com/dengue-frequently-asked-questions/. Field: Infectious Disease. Disease: Dengue </s>