Definition of Flu

shortened form of influenza-a highly contagious upper respiratory virus

Examples of Flu in a sentence

Although there are vaccines to defend against the virus, flu strains vary and can’t fully be protected against.  🔊

A flu epidemic swept through the U.S. in 1918, with the virus killing over 20 million people in two years.  🔊

Because it is a virus, the flu cannot be fully irradicated like bacterial diseases.  🔊

Struggling to breathe and burning up with fever, the patient was diagnosed with viral flu type A.  🔊

Getting a flu immunization early in the season can help workers prevent getting the virus and struggling with a lung infection later on.  🔊

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