- This event has passed.
World AIDS Vaccine Day
May 18
World AIDS Vaccine Day is observed on May 18, 2026. Learn, share, and look out for one another — awareness is where change starts.
Photo: NIAID via Wikimedia Commons.
World AIDS Vaccine Day is observed on May 18, 2026. Learn, share, and look out for one another — awareness is where change starts.
Photo: NIAID via Wikimedia Commons.