This is Carl’s clear explanation of why Zum Zum water is rare based on this morning’s post analysing the latest breakthrough test.
In just over 5 minutes, the video explains sensitivity, specificity, the positive predictive value, how prevalence affects the results and the problems of false positives and negatives.
There is a lot to cover in five minutes, but hopefully, this will clear up some of the confusion surrounding test accuracy results.
A short explainer on diagnostic accuracy