And polio eradication, in many ways, is even tougher, and there's a few reasons for that.
L'éradication de la polio, de bien des manières, est encore plus dure. Il y a plusieurs raisons à cela.
And polio eradication, in many ways, is even tougher, and there's a few reasons for that.
L'éradication de la polio, de bien des manières, est encore plus dure. Il y a plusieurs raisons à cela.