Airborne diseases are illnesses caused by pathogens that are transmitted through the air. These pathogens, such as bacteria and viruses, can be inhaled when an infected person coughs, sneezes, or talks. Common examples of airborne diseases include influenza, tuberculosis, and measles. Preventing the spread of airborne diseases often involves good hygiene practices, such as regular handwashing and wearing masks in crowded places. Proper ventilation in indoor spaces can also help reduce the concentration of airborne pathogens, making it less likely for people to become infected.