Whatever we've been taught, it seems like the lessons aren't sticking these days. And the most obvious result is the dramatic resurgence of a sexually transmitted infection that was once rare in this country: Syphilis. It's not the only STI with rates on the rise, but it is the most troubling—especially cases of congenital syphilis, in which a pregnant mother transfers the infection to her unborn baby.

Why have syphilis and other STIs returned with a vengeance? Is it a matter of education and prevention? Or is it a symptom of a larger problem?

GUEST: Dr. Vanessa Allen, Medical Microbiologist and Infectious Diseases Physician at Sinai Health; Associate Professor at the University of Toronto

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