>What’s happening that couldn’t be picked up by tests?
According to "science" most of the population (88%) is unhealthy to begin with. Add a vacation with side effects to that population + the psychosomatic hypochondriacs and presto.
Only 12 percent of American adults are metabolically healthy, study finds
Trends help sound alarm for efforts to lower associated risk of types 2 diabetes, heart disease and other complications
https://www.sciencedaily.com/releases/2018/11/181128115045.htm