Biological agents can gain entry to the body by which of the following methods?

Biological agents can enter the body through various routes, making the correct choice encompass all possible methods of entry. Inhalation allows infectious agents to penetrate the respiratory system and subsequently enter the bloodstream or tissues. Injection can occur through punctures in the skin or through contact with contaminated needles, introducing pathogens directly into the circulatory system. Eye absorption refers to the ability of biological materials to enter the body through mucous membranes of the eyes, where they can also cause infection. Since biological agents can utilize any of these pathways to invade the body and potentially cause harm, the answer that captures all these methods is the most comprehensive and accurate. Understanding these entry points is crucial for implementing effective safety and prevention protocols in laboratory and clinical settings.