Former “Two and a Half Men” star Charlie Sheen has the HIV virus.

In an interview Tuesday on NBC’s “Today,” the 50-year-old Sheen said he tested positive for the virus that causes AIDS.

But when asked by “Today” co-host Matt Lauer if he had transmitted the disease to others, he declared, “Impossible. Impossible.”

He said he was diagnosed about four years ago. He said one reason for going public with his condition was to put a stop to shakedowns from prostitutes and others who threatened to o