Infection that occurs while you are being treated for another infection

Wikipedia Word definitions in Wikipedia
A superinfection is generally defined as a second infection superimposed on an earlier one, especially by a different microbial agent of exogenous or endogenous origin, that is resistant to the treatment being used against the first infection. Examples ...

WordNet Word definitions in WordNet
n. infection that occurs while you are being treated for another infection

Wiktionary Word definitions in Wiktionary
n. An infection which follows or occurs during another infection or disease process.