Jen Byrn's infection with the mosquito-borne Zika virus has been confirmed by her doctor.

"I talked to my GP this morning," the 18-year-old Aucklander said yesterday of the results of a sample of her blood that was sent to Australia for Zika testing.

Jen said the illness seemed to have almost run its course, following her infection from mosquito bites when she was on holiday in Tonga last month.

"It's pretty much gone. I've got a headache and I'm a bit tired and my eyes are still a bit sore, but everything else has subsided. The rash is gone and I'm feeling more awake, less fatigued."

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Jen's case makes 11 confirmed cases of Zika in New Zealand this year, all caught when the people were overseas.