Final answer:
Polio is the deadly nervous system disease that is now rare due to effective vaccinations. Polio vaccines have almost completely eradicated the disease, which used to cause paralysis and death.
Step-by-step explanation:
The deadly nervous system disease that claims few lives thanks to vaccinations is polio. Vaccinations against polio have nearly eradicated this once pervasive and crippling disease. Polio, with its alarming capacity to cause paralysis and even death, once kept patients dependant on devices such as "iron lung wards" for survival. However, the development and widespread implementation of polio vaccines, particularly through mass immunization campaigns in the mid-20th century, have been incredibly successful in controlling this disease.
Rabies is another serious neurological disease that can be fatal. It is primarily transmitted through animal bites, notably from infected dogs. Thanks to strict control measures and the availability of the rabies vaccine, human infection rates are low in the United States and many other countries, although the disease still poses a threat in parts of Africa and Asia.