A blue flu is a type of strike action undertaken by police officers in which a large number simultaneously use sick leave.[1] A blue flu is a preferred strike action by police in some parts of the United States where police strikes are prohibited by law.[1][2][3][4] At times, the matter goes to court,[5] such as when officers need to undergo medical examination to prove genuine illness.[6] A 2019 opinion piece in The New York Times contrasted blue flu with a strike, calling it "a quiet form of protest, with no stated principles or claim for public attention or sympathy."[7] Unlike most strikes, blue flu tends to be focused and of short duration.[6][8][9]
^ abSpears, Richard (2008). McGraw-Hill's Essential American Slang. McGraw-Hill. p. 235. ISBN978-0071589345.
^George Vecsey (May 7, 2010). "Walking Tentatively in Protesters' Shoes". The New York Times. mysterious ailment that strikes police officers suddenly, overnight, during times of labor disagreements, causing them to miss a shift.