Winter illness (3)

I believe the answer is:

flu

'winter illness' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for flu that I've seen before include "Common infection" , "A bad winter bug" , "Infection reduced" , "Highly contagious viral disease" , "Winter ailment" .)

I've seen this clue in The Star Tribune, the USA Today, The Sun, the King Feature Syndicate, the L.A. Times Daily, the Family Time, the Universal and the Penny Press.

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