The K1 visa is a non-immigrant visa but prior to departure to the US, the petitionee undergoes medical examination and interview in the immigration section of the US Embassy where the petitionee resides- which basically means that a K1 visa undergoes the same process like most intending immigrants to the US.

Now, take note that in the medical examination required for K1 visa holders, it includes HIV testing. So you may also want to add that in an exception to the K1 visa (fiance and dependents), there is a provision that states that even if the K1 visa holder was diagnosed as HIV positive, the petitioner in the US may have the option to send in an affidavit that the petitioner is still willing to marry the petitioner even if the petitionee is found to be HIV positive. Thus, the petitionee who is found to be HIV positive, may still enter US soil.

You see, even if they lift the ban on intending immigrants diagnosed as HIV positive in entering US soil, that little piece of information or provision for K1 visa was available. It’s amusing, in some sense,that such a provision was already there in a special case for K1 visa holder. Think they might have overlooked that?