Board Thread:Questions and Answers/@comment-8334986-20130418001953/@comment-4632427-20130423032400

You're probably enjoying a beneficial bug, then. Infected were supposed to stop spawning at the end of the Infected event around Halloween 2012, so there's been no way to get new Black Nanopods for months. Unless, like Luxionmk2 said, you're still working on a backlog of Infected encounters that you racked up during the event.