It also showed that we seem to be putting history behind us more quickly, judging by the speed with which terms fall out of use.

WSJ: Culturomics Looks at the Birth and Death of Words

The upshot of all this activity is a marked reduction in the rate of new infections, though sceptics point out that the fall began before ARV use and circumcision became widespread, and that the role of behavioural changes (including a greater willingness to use condoms) should thus not be underestimated.

ECONOMIST: The 19th International AIDS Conference: Looking into the future | The