This info isn't new, as far as the brain being connected to the immune system, they just didn't know about the vessels.
As far as "new" therapies, why do you think cannabis works so well? It's because it helps deal with the brain, and immune system at the same time. The THC receptors in the brain help the brain become more active, and cbd, and CBN(on a smaller level), help stimulate the immune system. The problem is the smoking, but if you have a potent strain, you don't need to take that much puffs for the effect. Eating is the best, next to vaping.
It's just funny how they act like there is nothing out that can work to stimulate both, while still being safe.