Polio or poliomyelitis is caused by poliovirus which makes polio a highly infectious disease. Polio directly invades the nervous system and cause total paralysis within a couple of hours. Once a person is exposed to polio, symptoms can surface within three to five days.
Poliovirus usually evades the immune system by firstly surviving the acidic conditions of the gastrointestinal tract and allowing the virus to infect the host by quickly spreading throughout the body. Secondly, it multiplies in an overwhelming ration and catches the immune system in an off guard situation where immune system is unable to fight back.
Across the globe, 24th October is observed as World Polio Day.read more
Polio is known as a disease that can cause paralysis and death, but most people infected with the virus don't become sick and are never aware that they've been infected with polio.read more