The World Health Organization is warning that without expanded treatment and funding, drug resistant tuberculosis could become an extremely serious public health problem.

Even though the overall prevalence of TB has decreased over the last few years, the bacterium that causes the disease is changing quickly.

It’s become resistant to many of the drugs currently used to treat it.

TB causes 1.4 million deaths worldwide every year, more than any infectious disease apart from HIV.

The highest TB death rate is in Africa.