IPA: /nɒnɪnˈfɛktɪd/
KK: /nɑnɪnˈfɛktɪd/
Not having any infection or disease.
The doctor confirmed that the patient was noninfected after the tests were completed.
Noninfected → It is formed from "non-" (meaning not) and "infected" (from Latin "infectus", meaning tainted or contaminated). The word "noninfected" means not tainted or contaminated.
Think of 'non-' meaning 'not' and 'infected' meaning 'tainted' — so noninfected refers to something that is not tainted.