What happens in a negative pressure room?

In a negative pressure room, air is indeed forced out of the room. This is a specialized environment typically found in healthcare settings, particularly in isolation rooms for patients with contagious diseases. The primary purpose of a negative pressure room is to prevent airborne pathogens from escaping the room and contaminating surrounding areas.

The design of the room ensures that the pressure inside is lower than the pressure outside, which causes air to flow into the room from outside rather than allowing air to escape from the room into the outside environment. This movement of air helps to contain any infectious particles within the space, thereby effectively managing the spread of infections and protecting staff, visitors, and other patients.

Consequently, the other options do not accurately reflect the function of a negative pressure room: air isn't sucked into the room to create positive pressure, the air quality is actively managed and not left unchanged, and the airflow is not equal in and out, as the primary goal is to keep contaminants contained.