translation.en: The natural reservoir of influenza viruses is a diverse and constantly changing pool of viruses among wild water bird populations, the avian influenza (AI) viruses.
translation.is: Forðabúr inflúensuveira í náttúrunni er margskonar og síbreytilegt safn veira í villtum vatnafuglum, þ.e. fuglaflensuveirurnar (AI).