HFF, at different time points after infection (0, 2, 24, 48, and 72 hr) and after 2 hr incubation with PCM were analyzed for changes in MSD. Inset: MSD taken at Δt = 100 s vs. time after infection; error bars are standard errors. Baseline, n = 1623; PCM 2h, n = 876; TC 2h, n = 727; TC 24h, n = 1131; TC 48h, n = 607; TC 72h, n = 622.