endemic influenza

en·dem·ic in·flu·en·za

influenza, usually of a less severe type, occurring with some degree of regularity during the winter season, especially in the larger cities of the world. Synonym(s): influenza nostras

en·dem·ic in·flu·en·za

(en-demik inflū-enză) Influenza occurring with some degree of regularity during the winter.
Synonym(s): influenza nostras.