Not OP, but it is not clear that people should have the right to risk infection. The problem isn't that the person could get sick (which is something an adult should be able to make an informed decision on), but that having an infectious disease gives you the ability to spread said disease to nonconsenting people. If you think weapons should be regulated, you should think that a bad enough disease should also be regulated.

I'm referring to things that exist already. Sex is generally private, but if somebody is transmitting STDs while they do it, they are subject to public health contact tracing, which goes like this: https://www.ncsddc.org/wp-content/uploads/2017/08/infographi...

Actual details vary by state, but this is how CA does it: https://dhs.saccounty.net/PUB/Pages/Communicable-Disease-Con...

This seems reasonable to me. I don't think the right to privacy extends as far as the right to secretly give people diseases, especially ones that cause permanent damage and possible death.