> Trainings were canceled and delayed due to student or trainer illness This seems to specifically imply that illness in training pilots and pilot trainers is

> Trainings were canceled and delayed due to student or trainer illness This seems to specifically imply that illness in training pilots and pilot trainers is the cause. I would expect a more passive version to be "Trainings were canceled and delayed due to the Omicron surge..." which doesn't specify if anyone got sick.