respect to Centurions, the extent to which the Twelve are also is unclear. In the miniseries, William Adama fought with a Two who, despite suffering from radiation poisoning, proved to be stronger. The Two managed to break a metal pipe off of a plumbing fixture to use as a club, and lift Adama off the floor with one arm. Another Two was able to break apart a pair of metal handcuffs while under interrogation ("Flesh and Bone"). A Six engaged Kara Thrace hand-to-hand and proved to be exceptionally fast, agile and strong ("Kobol's Last Gleaming II"). Despite this, Cylons are (slightly less) vulnerable to most of the same things as humans. The Two who fought Adama was beaten to death with a flashlight, while the Six who fought Thrace was impaled by a piece of rebar. While the Twelve exceed human strength, they do not possess superhuman powers or resilience. Cylon skin appears just as vulnerable to breaking as human skin, bleeding just as a comparable wound would in a human. Cylons' mental faculties are sufficiently similar to those of a human to allow for manipulation. Cain and Thrace exploited this fact while "interrogating" Cylons. The experience of death (even ameliorated by resurrection) is traumatic and can leave deep emotional damage. Cylons are susceptible to an ancient virus that can be transmitted by rodents to which humans are immune, lymphocytic encephalitis. This virus was carried on a beacon left by the Thirteenth Tribe at the Lion's Head Nebula millennia before and disrupts all organic Cylon technology including Raiders, Hybrids (which in turn disrupts Centurions) and the skinjobs. The humans speculate that the beacon was accidentally contaminated when someone sneezed. The Cylons believe that a critical symptom of this virus, a harmful bioelectric feedback, can be transmitted during a download and attempt to prevent infected Cylons from downloading. The only immune Cylon is Athena, who had given birth to a half-human child and thus "inherited" human antibodies from her offspring (although it is unclear whether she retained this immunity after downloading). Dr. Cottle developed a vaccine after some Cylons were infected on a basestar near the Lion's Head Nebula. The disease requires regular booster shots to keep an infected Cylon healthy. The Cylons failed to develop a cure or a permanent vaccine to the virus. Cylons' silica pathways are affected by certain forms of radiation, such as that surrounding Ragnar Anchorage.