Ebright: The primary risks are
accidental release through accidental infection of a lab worker who then infects others — for which there are many precedents — and deliberate release by a disturbed or disgruntled lab worker, for which the 2001 US anthrax mailings provide a precedent.
Interesting to note that the Trailer for Manhunt was also removed, which was available
through the Australia Steam store prior to the
accidental release of Manhunt yesterday - as you can see in the screenshot we posted bellow, the trailer had been in the store since January 2008.