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enlighten me. I did not understand. What do you mean with typhoid mary?

Mary Mallon (September 23, 1869 – November 11, 1938), also known as Typhoid Mary, was an Irish-born cook believed to have infected 53 people with typhoid fever, three of whom died, and the first person in the United States identified as an asymptomatic carrier of the disease pathogen, Salmonella Typhi.[1][2] Because she persisted in working as a cook, by which she exposed others to the disease, she was twice forcibly quarantined by authorities, eventually for the final two decades of her life. Mallon died after a total of nearly 30 years in isolation.[3][4] WIKI

Oh, I remember reading about her, even probably on this, Tracy's Blog.
It sucks. How horrible it must be to be imprisoned for something you also may not understand or accept as true.
For me, the very issue of asymptomatic carriers, even if it would be true, is not something worth to consider to be helpful. It makes us all (including animals) to enemies.

The tests are sample biased and unreliable.

The conclusions do not even reach a baseline reliability of 3 sigma.

We're basically tracking "the common cold".