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).
Definition of 'obligated'. obligated (ÉblÉªgeÉªtÉªd ) If you feel obligated to do something, you feel that it is your duty to do it. If you are obligated to someone, you feel that it is your duty to look after them. I felt obligated to let him read the letter. He had got a girl pregnant and felt obligated to her and the child.