Primary and Secondary TB

Find out how TB can cause primary disease (soon after your first infection) or secondary disease (months/years after your first infection). Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical