Today’s interesting fact has to do with Tuberculosis (TB).

Many people know something about TB, usually that it was common and lethal in the past, and 100 years ago, everyone knew someone who had it.

Now, it seems to be confined to third world countries, and most people don't know anyone with it.

Back in 2005, in the UK they stopped inoculating people against the disease, because people were not catching TB in numbers that made it sensible to continue the vaccines.

But in London, in just 6 years, the number of the indigenous population catching the disease has increased to a point where they are considering re-introducing the vaccine.

Those being infected are catching it from people from overseas who are either visiting, as tourists or migrant workers, or from immigrants from countries where the disease is still prevalent.