cVDPV is the one that's the big problem. You can see how many cases are occurring here: http://polioeradication.org/polio-today/polio-now/this-week/ http://pol

cVDPV is the one that's the big problem. You can see how many cases are occurring here: http://polioeradication.org/polio-today/polio-now/this-week/ http://polioeradication.org/polio-today/polio-now/this-week/