The term
"overt disease" refers to a visible or easily detectable illness or medical condition. It means that the signs and symptoms of the disease are easily observed by others and can be confirmed through medical tests or evaluations.
Full definition
As β - cell function declines with age, the risk
of overt disease increases (17).
Early cataracts and retinal disease can easily go undetected until they are advanced, and may take years to progress to
cause overt disease.
The conventional medical system has very few (but very important) tools in diagnosis and when you are cleared
of overt disease you are often left with uncomfortable symptoms and no diagnosis.
Most exposures of humans to oocysts cause
no overt disease.