(Asyncs Only) This trait is only available to asyncs. The Watts-MacLeod virus has a special hold on the async and aggressively resists attempts by other strains of the exsurgent virus to gain a foothold in the character. Instead of the usual −20 penalty to resist infection, the character gains a +10 bonus. Any time they must make such a test, however, they immediately suffer the effects of a derangement for 1d10 hours after the test is resolved as the Watts-MacLeod strain asserts itself. They incur no stress along with this derangement, but multiple tests to resist infection may, at the gamemaster's discretion, incur additional derangements.