Flu season
Flu season is an annually recurring time period characterized by the prevalence of an outbreak of influenza (flu). The season occurs during the cold or hot halfs of the year in each hemisphere.
Flu season is an annually recurring time period characterized by the prevalence of an outbreak of influenza (flu). The season occurs during the cold or hot halfs of the year in each hemisphere.
Flu season is an annually recurring time period characterized by the prevalence of an outbreak of influenza (flu). The season occurs during the cold or hot halfs of the year in each hemisphere.
Source: Wikipedia "Flu season" · CC BY-SA 4.0
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