Medical researchers in Solomon Islands have shown previous cases of dengue, zika, chikungunya and ross river virus were not diagnosed at the time.
The work was undertaken by graduate student Humpress Harrington and David MacLaren from James Cook University in East Kwaio villages.
They worked together with Atoifi Hospital.
The researchers also discovered that a mosquito often responsible for spreading the viruses, Aedes Albopictus, is new to this part of the Solomons.
Don Wiseman spoke to Mr Harrington about his research.