👉 Towards infection, also known as invasion or colonization, is the initial phase where pathogens—such as bacteria, viruses, fungi, or parasites—enter and begin to interact with a host's body. This process involves the pathogen overcoming physical barriers like the skin or mucous membranes, which act as the first line of defense. Once inside, the pathogen must adhere to host cells, evade immune responses, and often acquire nutrients to multiply and establish itself. This phase is critical because it determines whether the infection will progress to active disease or remain a latent or asymptomatic state. Factors such as the pathogen's virulence, the host's immune status, and environmental conditions can significantly influence the outcome of this interaction.
