PER1 and infection: Specifically, WT matched infections had the highest amplitude, 55% higher than rescheduling infections (WT mismatched and Per1/2‐null TRF) and ~200% higher than parasites in arrhythmic hosts (Figure 4a; amplitude mean ± SEM: matched = 0.48 ± 0.05, WT mismatched = 0.33 ± 0.06, Per1/2‐null TRF = 0.30 ± 0.04, Per1/2‐null all‐day fed = 0.23 ± 0.03).