"American Idol" Is Plagued -- with the Flu!

Influenza is turning out to be a bigger threat to "American Idol" than DUIs, stripper scandals or the massacring of Beatles songs!

Sources tell TMZ since this season's nasty flu has infected contestants, their family members and show staff more than ever, a meeting was called to warn the "Idols" about being aware of who they come in contact with, ways to protect their voices and how to try to avoid catching the virus. Wash your hands, wannabes! We're told that some contestants have really taken it seriously and even be spotted wearing medical masks. The return of SARS!

Last night, the flu may have caused Ramiele's voice to go "bye bye"-- tonight we'll find out if she will!