How can biological agents enter the body?

Biological agents can enter the body through various routes, making the choice that includes all the options the correct one. Inhalation is a common pathway, where pathogens in the air can be breathed into the lungs, potentially leading to respiratory infections. Injection, which can occur through bites, needles, or any breaks in the skin, allows biological agents to directly enter the bloodstream, increasing the risk of systemic infection. Eye absorption represents another route, where pathogens can enter through the mucous membranes of the eyes—this can happen through splashes of infectious material or contact with contaminated surfaces. Understanding the multiple ways biological agents can enter the body highlights the importance of implementing safety measures to protect against contamination and infection in laboratory and healthcare settings.