The 1 in 200 chance is an old statistic. Since that time obesity and Vitamin D deficiency have both increased along with various other measures of health. The

The 1 in 200 chance is an old statistic. Since that time obesity and Vitamin D deficiency have both increased along with various other measures of health. There is good reason to believe that modern people have immune systems that will be less effective against polio infections and negative outcomes.