Poz

Her test results were poz.

Source: wiktionary

At a contentious public meeting to discuss barebacking in New York in 1999, an interesting statement came from a man who described himself as the manager of the nation's largest moderated bareback computer list. He stated almost in passing that the list was “about 98 percent poz guys.”

Source: wiktionary

I recall when we exchanged our HIV statuses at one point; not tonight. He's poz.

Source: wiktionary

However it’s hard to tell the truth from fantasy in the chats, which don’t include Boone talking of killing anyone, defence lawyer Ian Carter put to Lapointe. “During these hundreds of pages as part of that sexual fantasy of chasing, stealthing, pozzing or whatever you want to call it, he never indicates he wants to kill anyone?” Ian Carter asked her. “That’s correct,” said Lapointe, noting Boone does talk about giving people HIV and people dying of the disease.

Source: wiktionary