MMV is a viral infection that can cause a serious disease (called MMD)
MMD patients are unable to control their natural urge to make mathematical models that attempt to describe biological phenomena
The rapid MMV test gives a positive result:
100% of the time for people with the virus
5% of the time for people without the virus
A certain population has a prevalence of 1%
You pick a person from this population at random, and test them, and the test is positive.
You learn that your friend has a positive rapid test for MMV. What do you tell them?