This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The act or process of superinfecting a cell or organism.

n. An infection following a previous infection, especially when caused by microorganisms that have become resistant to the antibiotics used earlier.

n. An infection which follows or occurs during another infection or disease process.

n. infection that occurs while you are being treated for another infection

"If more than one virus enters the cell, it would be a waste, as only one can replicate once inside, and many viruses have ways to prevent this "superinfection"."

infection