Disease spreaders are organisms or agents that transmit infectious diseases from one host to another. Common examples include bacteria, viruses, and parasites. These pathogens can spread through various means, such as direct contact, contaminated surfaces, or vectors like mosquitoes and ticks. In addition to living organisms, non-living factors can also act as disease spreaders. For instance, airborne particles can carry viruses, while water sources can harbor harmful bacteria. Understanding how these disease spreaders operate is crucial for preventing outbreaks and protecting public health.