My organization recently held a big international conference in Nairobi with around 1,000 participants from all over the world. When our staff got back, almost every single one of them had a virus on their computers that would pop up pornographic ads every few minutes. Lovely.

Apparently there was one central computer where everybody brought their USB sticks if they wanted to print something and that is how the virus spread. I know, it’s ironic for an organization that deals with infectious diseases.

After I had stopped making fun of my colleagues, I asked them why they hadn’t locked their USB sticks so that they were “read only”. All I got in response was confused stares.