Health officials said infections are most likely between February and June, with cases typically peaking from March to May.
Symptoms include severe headache, fever, nausea, vomiting, muscle aches, drowsiness, confusion and seizures.
Authorities urged residents and visitors across the territory to take precautions, including using insect repellents containing DEET or picaridin, wearing protective clothing, ensuring tents are mosquito-proof while camping and avoiding mosquito-prone areas, particularly after sunset.
