Question

Humans occasionally become infected with common colds and flu after flying on crowded airplanes. Which microscopic biological hazard is most likely responsible?


vector-borne parasites


food-borne bacteria


environmental mutagens


airborne contagions

Answer 1

The microscopic biological hazard most likely responsible for humans becoming infected with common colds and flu after flying on crowded airplanes is **airborne contagions**. These include viruses and bacteria that can spread through the air, particularly in crowded and poorly ventilated spaces like airplanes.