7Healthcast: Study on brain tumors

Doctors at Duke Cancer Institute are attributing longer life expectancy for patients with brain tumors to an unlikely source.

They physicians believe that a tetanus shot could be enhancing the effects of cancer therapies.

The small study had dramatic findings.

Patients who received the tetanus booster lived 2-5 years longer.

The tetanus shot operated like a tornado warning system, preparing the immune system to attack the tumor and providing patients with months to years more of life.