Over 60 updates the infected count rises 9 → 16 while the total (900) is conserved every step — no cells appear or vanish. Virus accumulates to 1,216. Locality null-baseline: observed mean spread 15.01 sites vs 24.6 for uniform-random placement (ratio 0.61, below the 0.75 threshold), while a shuffled-field control fails at 1.13.