> Polio is asymptomatic or a mild flu-like illness for the vast majority of people infected (still a major public health disaster). Okay, yes, you're right. Wh

> Polio is asymptomatic or a mild flu-like illness for the vast majority of people infected (still a major public health disaster). Okay, yes, you're right. What I posted was an oversimplification. It's true that the vast majority of people who suffered significant complications of polio became very ill, and it was far far more common than measles complications.