What mode of transmission involves small particles that remain suspended in the air?

The mode of transmission that involves small particles remaining suspended in the air is termed airborne transmission. This occurs when infectious agents, such as certain viruses or bacteria, are carried in tiny droplets or dust particles that can remain suspended in the air for extended periods and can be inhaled by individuals, leading to the potential spread of infection over distances greater than what would typically be covered by larger respiratory droplets.

Understanding airborne transmission is crucial in infection control because it highlights the need for specific preventive measures, such as ventilation, air purification, and the use of masks that provide adequate filtration for airborne particles. This mode of transmission is particularly relevant for diseases such as tuberculosis, measles, and chickenpox, which can spread easily in crowded or enclosed spaces.