Ma'anar ƙamus na "mura" cuta ce mai saurin kamuwa da cuta ta hanyar numfashi wanda ke da alamun zazzabi, sanyi, ciwon kai, ciwon tsoka, da tari, kuma yana haifar da kowane ɗayan orthomyxoviruses, musamman nau'ikan ƙwayoyin cuta na mura. A, B, da C. Mura yana da saurin yaduwa kuma yana iya yaduwa cikin sauri ta hanyar al'umma, yana haifar da rashin lafiya mai yawa kuma wani lokacin yana haifar da matsaloli masu tsanani ko mutuwa, musamman a cikin tsofaffi ko mutanen da ke da raunin tsarin rigakafi.