Polio, or poliomyelitis, is a highly contagious viral infection that can lead to paralysis, breathing problems, or even death. The term poliomyelitis is from the Greek polios poliÃ³s meaning, grey myelos myelÃ³s referencing the, spinal-cord and itis. Meaning inflammation polio can be classified as either symptomatic. or asymptomatic
1 Prions are proteins that can force conformational changes in natural proteins and seem to cause disease (kuru, new variant Creutzfeldt-Jakob disease, and fatal familial insomnia).  A virus is an obligate intracellular pathogen (meaning that it must live within the cells of its host in order to reproduce).
radioligand. a radioisotope-labeled substance, e.g. an antigen, used in the quantitative measurement of an unlabelled substance by its binding reaction to a specific antibody or other receptor site.raÂ·dioÂ·liÂ·gand/ (-liÂ´gand) a radioisotope-labeled substance, e.g., an antigen, used in the quantitative measurement of an unlabeled substance by its binding reaction to a specific antibody or other receptor site.