Ключевые слова: air, airborne, bacteria, blue, breathing, care, color, disease, disposable, doctor, ear loop, elastic, equipment, fabric, face, filtering, front, guard, health, infection, isolated, layer, mask, medical, medicine, mouth, mouthguard, nose, object, pollution, proof, protection, protective, realistic, respirator, safety, side, side view, surgeons, surgery, surgical, surgical mask, three, variants, view, virus, white,