> The problem here is our old friend the Bayesian Base Rate fallacy. The diseases you're looking to intercept and intervene against are, in the general populati

> The problem here is our old friend the Bayesian Base Rate fallacy. The diseases you're looking to intercept and intervene against are, in the general population, pretty rare. This is pseudoscience at best and quakery at worst. Body is not a Kubernetes cluster that can be restarted or reprovisioned from scratch when it has become too late to fix an aling pod or a service on the spot. Physiological processes taking place in the body are more akin to stochastic processes whose behaviour can be accurately projected only to a certain extent (the extent varies depending on what the actual process is) based on levels of our current (but evolving) understanding of the biochemistry and phsysiology. Therefore, our bodies require a set of anomaly detection monitoring alarms, of which preventive health scans (whatever that means, not just CT/MRT/etc) are one example. If one such stochastic process goes awry, it can trigger an irreversible cascading failure in the body with the only outcome: premature death. Take inflammation as an example. Inflammation is a root cause of multiple severe as well as degenerative health problems that impair the healthy aging of the body. Inflammation is notoriously difficult to detect via conventional testing means such as blood tests, unless somebody is looking for a specific inflammation biomarker. Routine blood tests do not do that (other than checking the monocyte and eosinophils counts), and when the inflammation reveals itself, it is already loud (pain or impaired wellbeing) and severe (a heart attack) or it is already too late (late stage cancers). Inflammation starts out small and incospicous, and it takes a long time to progress and develop into something more unpleasant. Alzeheimer's, Parkinson, cancers, heart disease, IBS and many, many other health conditions have all been implicated to be caused by chronic inflammation processes that went undetected and were allowed to unfold, with plenty of sufficient (although not always fully conclusive yet) evidence. The vast majority of people of this planet are thought to have inflammatory processes going on of varying degrees of severity – from benign (that the body eventually suppresses) to malignant. If a routine preventive health scan can unravel an inflammatory process early on, it is a win – for the patient (improves the long term prognosis and the quality of life) and for the health care system (early treatments are usually simpler and are more cost efficient, therefore less or no expenditure later). Even if a preventive health scan is a false positive, it is still a net positive, is a net win as it indicates the lack of a health problem, and it is long term investment that time, effort and money for everyone.