"As you look at polio, we need to not be afraid to consider that we are in a different time now than we were then," Milhoan said. "Our sanitation is different, our risk of disease is different, and s…

"As you look at polio, we need to not be afraid to consider that we are in a different time now than we were then," Milhoan said. "Our sanitation is different, our risk of disease is different, and s…

