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Influenza-like illness is a nonspecific respiratory illness characterized by fever, fatigue, cough, and other symptoms that stop within a few days. Most cases of ILI are caused not by influenza but by other viruses (e.g., rhinoviruses, coronaviruses, human respiratory syncytial virus, adenoviruses, and human parainfluenza viruses).
Dry cough typically indicates COVID-19 compared with the flu. RSV, or respiratory syncytial virus, usually causes mild symptoms akin to cold that go away on their own. But for babies, some young ...
The standard influenza symptoms typically last for two to eight days. [13] Some studies suggest influenza can cause long-lasting symptoms in a similar way to long COVID. [14] [15] [16] Symptomatic infections are usually mild and limited to the upper respiratory tract, but progression to pneumonia is relatively common.
COVID, RSV, the flu, and common colds all come from contagious respiratory viruses. What's more, additional flu-like viruses circulate as well, muddying matters.
Flu. Symptoms. Sore throat, runny or stuffy nose and cough are all symptoms that the flu (aka influenza) shares with other respiratory viruses.
Highly pathogenic H5N1 avian influenza kills 50% of humans that catch it. In one case, a boy with H5N1 experienced diarrhea followed rapidly by a coma without developing respiratory or flu-like symptoms. [112] The Influenza A virus subtypes that have been confirmed in humans, ordered by the number of known human pandemic deaths, are: [citation ...