commonly known as Polio, is a viral
disease that has plagued humans
since ancient times. It is
transmitted primarily through
direct fecal-oral contact.
However, it can also be
transmitted by indirect contact
with infectious saliva or feces
or by contaminated sewage or
In over 90% of cases there are no symptoms but in those who show symptoms the illness takes three forms: Abortive polio in which people experience mild flu-like symptoms; a more serious form called nonparalytic polio in which a person experiences sensitivity to light and neck stiffness; and then there is the severe, debilitating form known as paralytic polio in which...