Hi,
Here's an article on a paper that shows that natural immunity is superior to vaccine induced "immunity", since the natural immune response is proven to strengthen the innate immune system:
"Scientists think of CD8 T cells as long-lived cells that become tuned to fight just one pathogen, but a new study finds that once CD8 T cells fight one pathogen, they also join the body's "innate" immune system, ready to answer the calls of the cytokine signals that are set off by a wide variety of infections."
"So it may be profitable in vaccine development to try to push CD8 T cells harder. When CD8 T cells are exposed to the specific virus they are tuned for, they multiply greatly, a process called expansion."
That last quote shows that vaccine immunity is deficient compared to natural immunity.
cheers, Jamie