According to Sasha Grey’s Twitter feed, the porn actress/star of Steven Soderbergh’s The Girlfriend Experience (of which I am a big fan) returned from Australia yesterday, where she was promoting the movie at the Sydney Film Festival, to learn that a Los Angeles-based porn actress has tested positive for HIV. The actress, who is being identified as Patient Zero, had two male partners in the industry who are in the process of being tested, and in the meantime, the Adult Industry Medical Healthcare Foundation is advising performers who have worked with the infected actress or people she has worked with “not to work.” Sasha Grey is apparently taking the same precaution; last night, she twittered: “I have my partners tested two days before I do a scene with them, but I’m abstaining until our industry hears more about this.” Follow her Twitter feed for further updates.