4 ms·
Just to be clear, there are other ways of acquiring polio, namely oral-to-oral transmission: http://en.wikipedia.org/wiki/Polio#Transmission http://en.wikipedi
by dbul 17y ago
Just to be clear, there are other ways of acquiring polio, namely oral-to-oral transmission:
http://en.wikipedia.org/wiki/Polio#Transmission http://en.wikipedia.org/wiki/Polio#Transmission