Face masks for use by health care providers; face coverings being sanitary masks for protection against viral infection; patient breathing system comprising a breathing circuit, connections to patient, fresh gas delivery circuit, and air recirculator; personal protective equipment, namely, masks for use by medical personnel and patients for protection against environmental pollutants, allergens, viruses, microbes, and dust particles

'air':34 'allergen':53 'breath':20,24 'care':7 'circuit':25,32 'compris':22 'connect':26 'cover':10 'deliveri':31 'dust':57 'environment':51 'equip':38 'face':1,9 'fresh':29 'gas':30 'health':6 'infect':18 'mask':2,13,40 'medic':44 'microb':55 'name':39 'particl':58 'patient':19,28,47 'person':36 'personnel':45 'pollut':52 'protect':15,37,49 'provid':8 'recircul':35 'sanitari':12 'system':21 'use':4,42 'viral':17 'virus':54

ZURI

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