flu

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flu:

see influenzainfluenza
or flu,
acute, highly contagious disease caused by a RNA virus (family Orthomyxoviridae); formerly known as the grippe. There are three types of the virus, designated A, B, and C, but only types A and B cause more serious contagious infections.
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flu

Informal
1. short for influenza
2. any of various viral infections, esp a respiratory or intestinal infection
References in periodicals archive ?
Many people are deeply bothered by injections or they suffer from persistent side effects, most notably flu-like symptoms, but also reactions at the injection sites, or depression.
He fell into a slump in mid-May shortly after developing flu-like symptoms that kept him out of the lineup for several days.
Conflating the flu-like symptoms of withdrawal with addiction itself, she calls heroin use a "sickness," a "disease," an "illness.