According to Microsoft, the global average for malware infection is 8.6 out of every 1000 systems—a number that's lower than I'd have estimated. And apparently Ethiopia and Myanmar run a pretty tight ship!
Russia and Brazil were found to be the most infected.
Other interesting findings by Microsoft's cyber security team include that, at the moment, 97% of all emails are spam. In other words, for every 3 emails you want to see, you get 97 that resemble Gizmodo's mainpage on April 1st. (And you thought we were annoying...which we were.)
More interesting stuff over at the BBC. [BBC]