One user argues that AI’s medical benefits will far outweigh the risks from engineered bioweapons, claiming viral evolution favors spreading without killing hosts and would quickly remove engineered lethal features. A user quoting that argument challenges the reassurance: we don’t know how deadly engineered viruses could be, and AI will weaken constraints imposed by limited knowledge, expertise and access to technology. That user warns defenses may not keep pace, even before anyone can spell out exactly how a catastrophe could happen.