Contagious diseases spread through different mechanisms. The primary methods are:
Direct Contact: Physical touch or close proximity, such as shaking hands or hugging. Airborne Transmission: Pathogens spread through respiratory droplets when an infected person coughs or sneezes. Vector-Borne Transmission: Insects or animals transfer the disease from one host to another. Fomite Transmission: Non-living objects like doorknobs or surfaces that carry infectious agents.