Firstly, I'd say you're NOT contributing to bugchasing. Your profile and posts make it clear that you aren't going to help people do it, nor to you condone or encourage it.
Secondly, you are not responsible for the actions of others. That's on them. You happen to have HIV. Suppose for a moment that you did have a significant viral load (for whatever reason), and thus represented some kind of temptation to bugchasers who were serious about it, would not be a failure on your part. It would simply be a fact, whether or not you had made choices that caused it to be that way (either could be the case). The chaser's feelings and actions are their problem. The world is full of temptations and dangers... and dangerous temptations. It is not our responsibility to protect others from them, though it might be honorable and morally upright to do so, especially if they are less capable of doing so themselves (children, for example).
Thirdly, and this is not intended to be judging you, merely to put things into perspective, we are living in a world where people hurt and kill themselves and others (not to mention wrecking the planet and other living creatures) all the damn time. Just now we have frequent mass shootings, pandemic, war, and global climate change. So concern over encouraging bugchasing merely by participating in BZ belongs (in my opinion) squarely in the category of "high-class worries".