raster flat flu virus warning icon

accident advice alarm alert asian attention bacillus bacterium biohazard catarrrh caution chill contagious corona coronavirus covid2019 danger design elementquot exclamation fever flat fluquot hazard icon iconquot illustration infectious information mark mers microbe microbiology microorganism outbreak outbreakquot pandemic pictogram pneumonia pointer precaution problem quot raster risk safety sars sickness signal symbol viral virusquot warning