Lieutenant Brooks was a member of SG-6. After his team went on a reconnaissance mission to P2X-885, he was quarantined and may have contracted the Prior Plague.
SG-6 was on an undercover mission on P2X-885. There they witnessed the Prior convert the population to the Ori religion. Airman Ryan and Lt. Fisher were among the crowd as the Prior passed through, and the Prior touched Lt. Fisher's head while passing as if in blessing.
Unbeknownst to Fisher, this contact made him a carrier for an Ori plague. It was missed in his post-mission exam because it was a previously unknown strain of the disease. After Colonel Barnes fell gravely ill, the rest of the team was put into quarantine. Soon after they found Lt. Fisher, who had traveled off-base, Dr. Lam reported that Ryan was showing early symptoms of the disease and that Lt. Brooks had been quarantined as well. Later, Dr. Lam reported to Gen. Landry that five SGC personnel died from the disease, but it is unknown if Brooks was one of the casualties.
--Aurora 12:19, 7 April 2006 (PDT)