A new study by the VA is showing that a parasite from the jungles of Vietnam may be slowly killing Vietnam War veterans. The study was conducted using blood samples of the veterans.
The VA issued a study this spring to look at the connection between liver flukes that were ingested through undercooked fish and a rare bile duct cancer. The study shows that the disease can take decades to manifest into symptoms, by which time the victims are likely to be in tremendous pain and with only a few month left to live. 20% of the samples submitted came back positive or bordering positive. (source) 7:52 p.m. ET November 21, 2017