The exact date of the discovery of viruses is unknown. However, many scientists believe that viruses have been around for over 3. 8 billion years.
It's been around for as long as we can remember it is nothing new but since it lays dormant for a while who knows it could of progressed into something since the begging
about 300 years.
A long time! Not any more, though.
Everyone who has been affected by polio have benefited from the post polio program. This includes the people who were infected by polio and the people who took care of them.
Post-polio syndrome occurs some decades after the original infection with polio.
Franklin Roosevelt contracted polio which left him paralyzed from the waist down. He had to have a wheelchair to get around after that.
how long has deforestation been around
As long as guns have been around.
No. It is a set of neurologic symptoms which exist long after polio, itself, is experienced by the sufferer.
FDR was disabled by polio. A common disease that there was no cure for back then. Later on in the 1950's one man found the vaccine for polio. So, polio is no longer an issue.
it made it so they had to get around in a wheelchair
Last one? Polio is still problematic. We are working on ridding the world of this disease. Source: http://www.polioeradication.org/disease.asp