Description
Poliomyelitis (polio) is a highly infectious viral disease that largely affects children under 5 years of age. The virus is transmitted by person-to-person spread mainly through the faecal-oral route or, less frequently, by a common vehicle (e.g. contaminated water or food) and multiplies in the intestine, from where it can invade the nervous system and cause paralysis.
visit url: https://www.youtube.com/watch?v=UZcrL8DHAp8
visit url: https://www.youtube.com/watch?v=UZcrL8DHAp8