Vector-borne transmission refers to the spread of diseases through vectors, which are living organisms that can carry pathogens from one host to another. Common vectors include insects like mosquitoes, ticks, and fleas. These organisms can transmit diseases such as malaria, dengue fever, and Lyme disease when they bite humans or animals. The process typically involves the vector becoming infected with a pathogen, which then multiplies within the vector. When the vector bites a new host, it can transfer the pathogen, leading to infection. Understanding vector-borne transmission is crucial for controlling outbreaks and protecting public health.