The transmission of opportunistic infections varies depending on the pathogen:
Person-to-Person: Some infections, like tuberculosis and CMV, can spread from one person to another. Environmental Exposure: Certain pathogens like Aspergillus (a type of fungus) are acquired from the environment. Endogenous Sources: Some infections arise from the body's own flora, such as candidiasis, which is caused by the overgrowth of Candida species already present in the body.
