Polio eradication: the final chall Figure 4.1 Endemic polio in 1988 and mid-2003 1988 Endemic >125 countrie Non-endemic 2003 Endemic 7 countries Non-endemicPolio Eradication: the final challenge 61 Endemic Non-endemic 2003 7 countries Endemic Non-endemic 1988 > 125 countries Figure 4.1 Endemic polio in 1988 and mid-2003