In a "perfect world" we'd all get routine checks, this would have two advantages: * Most illneses are easier to treat and have better long term outcomes in ter

In a "perfect world" we'd all get routine checks, this would have two advantages: * Most illneses are easier to treat and have better long term outcomes in terms of morbidity, when they are detected early / in a asymptomatic stage. * We could collectively use the data collected from scanning "healthy" people, and adjust our bayesian priors so that we can more accurately adjust our diagnostic measures. E.g. common virus infections can give you brain lesions visible in MRI scans. However since MRIs are expensive we rarely scan healthy people so every lesion in an MRI is an immediate supicion of MS or other neurodegnerative diseases. We simply don't have good baselines for this. The latter would allow us to look at all the indicators more holistically to make a well balanced judgement if more invasive diagnostics are warranted.