Can fog go inside a house?

Fog itself consists of tiny water droplets suspended in the air, so it can enter a house if there are openings like doors or Windows. However, once inside, it may condense and create a damp environment, but it won't settle in a solid form. The perception of fog inside a house might be more about high humidity rather than a dense fog like that found outdoors. Proper ventilation can help prevent excess moisture from accumulating indoors.