What does uninfected mean?
Uninfected means not infected, or free from the presence of an infection. It is used most often in medical, biological, and public-health contexts to describe a person, animal, plant, wound, tissue, fluid, or other material that has not contracted an infection. For example, researchers may report that exposed individuals remained uninfected, while a clinician might determine that tissue around a wound is uninfected. The word can also be used more broadly in laboratory and environmental descriptions, such as blood samples or stored biological material. It is more precise than saying that something is clean, because cleanliness and freedom from infection are not identical qualities. It is also distinct from disinfected: uninfected describes the absence of infection, whereas disinfected indicates that something has been treated to eliminate harmful microorganisms. Uninfected therefore belongs to formal and technical registers, especially where the status of a person or sample is being carefully established.
adjectiveNot infected; free from infection.
- Free from infection, whether referring to a person, organism, bodily tissue, wound, or material.
"The surgeon confirmed that the surrounding tissue remained uninfected."
"Most people exposed to the virus remained uninfected."
"Laboratory tests showed that the stored blood was uninfected."
Uninfected is not the same as disinfected: one describes the absence of infection, while the other describes a process of microbial decontamination.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does uninfected come from?
The adjective was formed in English by combining the prefix un- with infected and the suffix -ed. Infect derives from Latin inficere, formed from in- and facere, meaning to make or do; the Latin verb originally referred to tainting or staining. English developed both infect and its negative form uninfected in medical usage before the latter acquired broader scientific applications.
How uninfected is actually used
This is primarily a formal medical and scientific adjective. It describes the absence of infection but does not necessarily imply that the subject has been sterilized or treated to remove microorganisms.
Easily confused with uninfected
Uninfected means free from infection, whereas disinfected means treated to eliminate harmful microorganisms.