Texas residents David and Michelle Paul arrived in Fiji on May 22, Fiji's Ministry of Health and Medical Services said in a statement. "I would like the whole world to know if they died of infectious diseases".
Calanag said he wanted the CDC to confirm how they perished and "tell Americans and other people that these are the issues you're going to face if you have to travel to Fiji".
In addition to leaving behind their son and David's daughter, the pair also shared a dog named Zooey, who Calanog recently set out to find after she had been boarded at an unknown kennel before the couple's vacation.
According to the couple's family, there is some indication that the couple may have contracted some type of virus, ABC News reported.
Michelle was a former college athlete and David was an Air Force veteran, so both were "very physically fit", Tracey Calanog, Michelle's sister-in-law told KVUE, making their case even more confusing.
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"They knew something was going on in their body and were able to get to the hospital", Calanog said Monday.
It's believed the couple from Fort Worth had been planning their "amazing vacation" to Fiji for quite some time, leaving behind their two-year-old son and a daughter from David Paul's previous relationship with family in the USA for the two week trip.
She said the couple's children were with relatives.
"We were literally just calling places on a hope and a prayer ... we are incredibly grateful for everyone that came together and helped locate Zooey", she said, according to ABC 7.
Calanog said the cause of death must be determined before the bodies are returned to the U.S., and if an infectious illness is found to be the cause, their bodies will have to be cremated.