Airman Malcolm McCaffrey was among the SGC personnel who were possessed by Anubis. Following the destruction of Anubis's fleet over Antarctica, the disembodied entity of Anubis survived and inhabited several people in an attempt to use a host body as a means to escape through the stargate. McCaffrey was taken as a host some time after Anubis had left the body of Lieutenant Evans, and he attacked several airmen as he made his way to the control room. There he was zatted by O'Neill, and Anubis left McCaffrey's body and entered the walls of the facility. McCaffrey recovered from his exposure.
Cross Reference: Anubis, Lieutenant Evans, Major Kearney, Anatole Konstantinov, Alexi Vaselov
Episode Reference: Lockdown