How does the method of Inoculation work?

Inoculation refers to the process by which a pathogen is introduced into a host organism, often through the action of a vector. In option B, the description states that the vector injects the pathogen during feeding. This is an accurate representation of how many vectors, such as mosquitoes or ticks, transmit diseases. During the feeding process, the vector introduces pathogens into the host's bloodstream, enabling the pathogen to establish an infection.

This method is particularly significant in the context of diseases that are transmitted by insect vectors. The vector serves as both a carrier and a facilitator of the pathogen's entry into a susceptible host, which is crucial for the pathogen’s lifecycle and propagation. Understanding this mechanism highlights the importance of controlling vector populations to reduce the incidence of vector-borne diseases.