“And what is up with the obsession with HIV?” Uh, because up until recently it was a slow agonizing death sentence, and still can be if you do not or cannot take your cocktail of medication regularly?
“How about hepatitis?” Yes, you should absolutely be required to inform your partner that you have one of the sexually-transmitted variants of hep.
“Do you think that person on the airplane a few years ago that knowingly exposed and thereby infected people with a rare form of resitent TB should be charged?” Do you mean resistant? Also, YES. ‘Knowingly’ is the issue here! Stop getting people sick on purpose, you could cause deaths!
“Do you think the way Typhoid Mary was treated is appropriate?” Yes, and no. Her situation is tragic because at that time there were no available antibiotics to treat the infection, gallbladder removal was frequently a death sentence, and taking jobs that offered less risk of spreading the infection to vulnerable people ALSO meant losing out on a majority of her income, leaving her well below the poverty line. She had no choice but to keep working as a cook, BUT that doesn’t mean that the government was wrong to forcibly isolate her. She caused numerous illnesses and at least 3 but perhaps up to 50 deaths. You cannot go around knowingly acting as a plague vector in the name of personal freedoms. Luckily, modern technology and medical advancements have made it a) much easier to know if someone is ill, b) much easier to treat most illnesses. If we would add a way to ensure that someone who must be isolated for the good of others could still earn a decent living (perhaps via universal basic income???), another Typhoid Mary situation could be avoided.