If you mean HIV, which most intelligent people would understand that it is the cause of the syndrome called AIDS, then it is much more difficult to contract tha

If you mean HIV, which most intelligent people would understand that it is the cause of the syndrome called AIDS, then it is much more difficult to contract that Chickenpox. Either via blood transfusion or sex, both of which are controllable by the infected. If the infected choose to bring the risk to others and infect them, they can be held criminally liable.