Typhoid mary is propoganda. Which is why we know about it at all (sensationalist media).
When things go wrong / people get sick, people expect a scapegoat. Which the media/state delivers to the bloodthirsty monsters/mob, without any concern for justice whatsoever. "Just kill the rosenburgs and get back to work", they say. Other times it's "the china flu", as blaming the cause of your ills on an existing "enemy" works particularly well.
Establishing causality is notoriously difficult. Doing so in a medical context with a pathogen, or perhaps a carrier, is even more so. No such causality was established with mary, she was simply the one who took the blame (repeatedly).
First off, who is the media?
The media is whoever you decide it is.
Second, if you get your world view from the media, you will never know the truth and be screwed up the rest of your life.
If you have no friends, no job, no professional connections in other Industries, if you never go outside, you can make up and believe anything you want and blame everything else on the media.
Those of us in the real world have seen the crowded emergency rooms. We've seen what it's doing to the doctors and nurses we know. We've known people who died and others that got sick.
Just stay in your basement where you are safe from Russian cyber attacks, air pollution, pandemics and Truth.