TB Silent Killer investigates the shocking reality of a disease that was once thought to be a historical relic. There are more than 8 million new tuberculosis infections every year — with outbreaks spreading to the US and Europe.

And with multi-drug-resistant strains emerging faster than ever, TB — passed simply by a cough or a sneeze — has become the world’s second leading cause of death from an infectious disease.

“The cost of inaction is way too high,” warns Salmaan Keshavjee, an associate professor of global health and social medicine at Harvard Medical School.

So what actions should we take? How is the world reacting to recent outbreaks? Is there hope for people living with drug-resistant strains of TB? How easily and quickly can the disease spread? How much will it cost us to fight?

We’ve asked TB Silent Killer filmmaker Jezza Neumann, along with Doctors without Borders TB adviser Grania Brigden, Executive Director of Results, Joanne Carter, and NPR global health reporter Michaeleen Doucleff to join us for a live chat to answer those questions and take yours.

We’d like to thank NPR Shots Blog, Doctors Without Borders and Results for partnering with us on today’s chat.