We need to be aware that these infections have been detected in captive animals, which may have been exposed to other HBV-infected hosts during captivity.
Three of Mr. Moore's bodyguards died during captivity and their remains were returned to their families last year.
The couple insist they were forced to pledge allegiance both publicly and privately to communism during captivity, but for many in the South any pledge of allegiance to the North is unforgivable.
Asked if he had felt their lives had been in danger during captivity, he said: "That's something we'll talk about later, but we were not really directly endangered by the gang, after the initial seizure".
Peter Halmay, a commercial fisherman based in San Diego and founder of the San Diego Fishermen's Working Group, worries that farmed fish could develop viruses during captivity that would be released into the ocean and devastate native fish.
In many of these cases, the reported sex of the supposedly long-lived tortoise, or the species, or even both, have mysteriously changed during captivity, making it difficult to accept the reliability of such reports.
