The answer was that in Burundi, having a clean bill of health has taken on a very particular meaning: unless and until you have paid for your hospital treatment, you simply can't leave, you are in effect a captive. ↗
A man who leaves home to mend himself and others is a philosopher; but he who goes from country to country, guided by the blind impulse of curiosity, is a vagabond. ↗
Stones are checked every so often to see if any have split or at worst exploded. An explosion can leave debris in the elements so the firing has to be abandoned. ↗