A health alert is in force in French Polynesia amid fears that dengue type 2 could spread.
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A second person has been diagnosed with the the mosquito-borne illness in Papeete, just days after their neighbour contracted the virus in Tahiti.
French Polynesia has been spared a dengue type 2 epidemic for about two decades which means that the public has low immunity to the disease.
In February, a man who had arrived from New Caledonia was taken to hospital suffering from dengue type 2.
Dengue type 1 is affecting more than a dozen people across several archipelagos, including the Marquesas.
Meanwhile, an influenza outbreak keeps spreading.
Almost 600 people have fallen ill in the past two weeks and 80 have been taken to hospital.
A 73-year-old woman with already compromised health has died of the disease.