No operationally oriented strategy is immune from copy-cats, and Dell discovered other companies could do pretty much what they did and achieve its costs.

FORBES: Dell Won't (Can't) Grow - Sell DELL

Researchers reported fresh evidence Wednesday that using gene therapy to manipulate the immune system is emerging as a promising new strategy in the fight against cancer.

WSJ: Gene Therapy Shows Promise as Cancer Treatment

Back then AIDS vaccine research was focused on stimulating the immune system to produce antibodies against the virus, a standard strategy that worked for polio and other diseases.

FORBES: Outsmarting AIDS