Study suggests harmful diagnostic errors may occur in 1 in every 14 general medical hospital patients
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Misdiagnosis rates are about seven percent (7%).

Drosophila melanogaster
Drosophila melanogaster - Wikipedia

First map of every neuron in an adult brain has been produced for a fruit fly
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Neuroscience breakthrough: Entire brain of adult fruit fly mapped
Neuroscience breakthrough: Entire brain of adult fruit fly mapped | ScienceDaily.

FlyWire Brain
FlyWire

A Complete Electron Microscopy Volume of the Brain of Adult Drosophila melanogaster
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6063995/

A Single-Cell Transcriptome Atlas of the Aging Drosophila Brain
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6086935/

The human brain is at least 136,100 x Drosophila melanogaster brain.
(Fruit Fly) . . . thus there is much more work for a light a tunnels end is seen.