Allergy: Dose-by-Repetition Sensitization, the Latch, and Controlled Desensitization

Allergy is a failure of immune ignorance: a single sub-spinodal exposure stays tolerant, but a sub-threshold dose REPEATED accumulates priming and sensitizes after a critical count that falls as the dose rises, and the sensitized state latches after antigen clears. A controlled below-crossover protocol raises the challenge threshold and desensitizes. DIRECTION/CLASS only, not medical advice. Grade [V].

Allergy is the failure mode of immune ignorance on the same effector: a single exposure commits only past the spinodal, but a sub-threshold supra-crossover dose repeated accumulates priming and sensitizes after a critical exposure count that falls as the dose rises, and the sensitized effector latches after the antigen clears. A controlled below-crossover exposure protocol raises the challenge threshold so the once-sensitizing dose no longer commits — re-tolerization through exposure — while an over-aggressive above-crossover protocol sensitizes instead, so the desensitization window is real. Measured dynamics [V]; absolute dose, crossover and exposure count [O], not medical advice.

Allergy: sensitization, the latch, and controlled desensitization

Allergy is the failure mode of immune ignorance on the same R19 effector. A single antigen exposure commits the effector only when it crosses the spinodal (measured critical dose 0.977× the spinodal, the same commit threshold as the tolerance/immunity window), so a sub-threshold dose alone stays tolerant. The pathology is in REPETITION: a sub-threshold but supra-crossover dose REPEATED accumulates priming and sensitizes after a measured critical number of exposures, and that number FALLS as the dose rises (N_crit = 4 exposures at the lower dose, down to 1 at the higher).

Once sensitized the effector LATCHES: it stays ON after the antigen has cleared (measured residual occupancy 0.997), the same R19 memory that protective immunity uses, here turned against a harmless antigen. Removing the antigen therefore does not by itself reset the sensitized state.

The cure is a controlled re-exposure, and it is a window. A controlled BELOW-crossover exposure protocol accumulates tolerance faster than priming and RAISES the challenge threshold, so a dose that commits a naive effector no longer commits the treated one (measured challenge commit falling from 0.583 naive to 0.003 after the protocol, the threshold raised monotonically with protocol length). The window is real and bounded: an over-aggressive ABOVE-crossover protocol SENSITIZES instead (measured challenge commit 1.00), because tolerance out-accumulates priming only below the measured crossover dose 0.475. Basin-acting controlled re-tolerization desensitizes; avoidance alone leaves the latched state in place.

Part of the disease/treatment axis: a pathological immune state is a latched basin, and the durable class of intervention moves the system across the saddle-node rather than only holding the drive down, which relapses on withdrawal.