[inkcapmushroom]

It's both. You try to prevent the disease, but for those who get infected anyways, you try to improve their tolerance. In fact this research could potentially benefit the immunocompromised the most, in that they can't rely on their immune system to prevent buildup of pathogens so when they get sick they will likely end up with a larger number of pathogens compared to an individual with a healthy immune system. If research can find ways of stopping that larger buildup from damaging the body, then being immunocompromised is no longer as dangerous for the individual.

However, for those that have a weak immune response and also don't or can't get this new tolerance treatment, it would be a net negative, on that I can agree.