Prince Harry took an HIV blood test live through Facebook on Thursday to show how easy it is be checked, NBC News reported.
Video of the test, which was completed at a London hospital and included an unidentified health worker's explanation, was streamed live on the British royal family's Facebook page.
"It is amazing how quick it is," the 31-year-old Harry said.
His test came back negative.
He added, "So whether you're a man, woman, gay, straight, black or white — even ginger — why wouldn't you come and have a test?"
Prince Harry announced on Thursday he will attend the 21st International AIDS Conference in Durban, South Africa, on July 20.