Generally it is an acute market rather than chronic. You take an antibiotic for seven to 10 days and that is it. You have to be sure there will be sufficient volume of people taking it to make it worth it.

Emergencies come and go, but we are now in an acute phase of a chronic problem and the effects of this are going to be with us for generations to come. This is not about one issue or one country. Many factors are converging to undermine livelihoods of millions of people in southern Africa.

Early detection and antibiotic therapy has been promoted as a means to delay chronic bacterial lung growth and prolong life, and breath analysis may be an effective first step toward treatment. In the long term, these findings on sulfide levels also might help uncover some of the underlying mechanisms of the disease.

And I went off to Ghana for what was intended to be seven days. I spent what was well over a year in Africa, teaching and travelling.

And after he is cleansed, they shall reckon unto him seven days.

There's seven or eight companies fighting for 20 percent of the market.