purulent inflammation of right frontal sinus in a person and close-up view of bacteria moraxella catarrhalis that cause sinusitis

frontal frontitis sinusitis sinus paranasal respiratory anatomy microbial science acute treatment bacterial inflammation allergic pain medical sickness cavity human nasal sick infection healthy black background cold illness nose disease health medicine face illustration adult anatomical chronic microbe bacteria closeup macro rhinosinusitis moraxella catarrhalis plain man male person patient