As a noun superinfection
is an infection which follows or occurs during another infection or disease process.
As a verb superinfect is
to infect as a superinfection.
superinfection
English
Noun
An infection which follows or occurs during another infection or disease process.
References
* http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=mesh&list_uids=68015163&dopt=Full
* http://en.wikipedia.org/wiki/Superinfection