Answer
The patient on the operation theater is on low immunity. Thus by maintaining a high pressure we can make sure that the pressure causes the air to flow outwards thus causing the bacteria to flow outwards and thus away from the patient.
Work Step by Step
The patient on the operation theater is on low immunity. Thus by maintaining a high pressure we can make sure that the pressure causes the air to flow outwards thus causing the bacteria to flow outwards and thus away from the patient.