I always find it really cool when we can harness the body's capability like this—making antibodies as drugs. One problem with this treatment is that it can't target viruses that are already hiding inside DCs or T cells. However, it could stop the disease from progressing farther or perhaps provide an effective way to passively immunize people most at risk. Antibodies are super expensive, but PGT 128 is powerful enough that very little is required, so this might actually be a possible solution (in the first world at least—maybe for inclusion with blood transfusions?).