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    Pollen grain, light micrograph. Pollen grain is the microscopic body that contains the male reproductive cell of a plant. — Stock Photo
    Pollen grain, light micrograph. Pollen grain is the microscopic body that contains the male reproductive cell of a plant.
    Side view of young female pediatric doctor in medical mask doing inhalation treatment with nebulizer for little boy having respiratory problem in hospital — Stock Photo
    Side view of young female pediatric doctor in medical mask doing inhalation treatment with nebulizer for little boy having respiratory problem in hospital
    Female doctor teaching senior patient how to use inhaler in doctors office — Stock Photo
    Female doctor teaching senior patient how to use inhaler in doctors office
    Monitoring respiratory illness with digital spirometer. — Stock Photo
    Monitoring respiratory illness with digital spirometer.
    Nebulizer with tube against white background. — Stock Photo
    Nebulizer with tube against white background.
    Female doctor holding inhaler, close-up. — Stock Photo
    Female doctor holding inhaler, close-up.
    Coloured scanning electron micrograph (SEM) of the common environmental and allergenic mould (Cladosporium sp.); fungal hyphae producing spores. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the common environmental and allergenic mould (Cladosporium sp.); fungal hyphae producing spores.
    Preteen girl breathing into peak flow meter and looking at nurse. — Stock Photo
    Preteen girl breathing into peak flow meter and looking at nurse.
    Little boy with balloon sitting on blanket — Stock Photo
    Little boy with balloon sitting on blanket
    Side view of little boy with asthma using inhaler while lying down on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while lying down on sofa at home
    Diseased lungs in transparent male body on black background, computer illustration. — Stock Photo
    Diseased lungs in transparent male body on black background, computer illustration.
    Spring flowers representing healthy human lungs, conceptual studio shot. — Stock Photo
    Spring flowers representing healthy human lungs, conceptual studio shot.
    Spring flowers representing healthy human lungs, conceptual studio shot. — Stock Photo
    Spring flowers representing healthy human lungs, conceptual studio shot.
    Senior woman using asthma inhaler with extension tube. — Stock Photo
    Senior woman using asthma inhaler with extension tube.
    Blond boy, about 8 years old, wearing a respirator to co-infect himself with a virus — Stock Photo
    Blond boy, about 8 years old, wearing a respirator to co-infect himself with a virus
    Diseased lungs in transparent female body on black background, computer illustration. — Stock Photo
    Diseased lungs in transparent female body on black background, computer illustration.
    Mature man using asthma spacer with blue asthma inhaler. — Stock Photo
    Mature man using asthma spacer with blue asthma inhaler.
    Cropped shot of woman holding inhaler device. — Stock Photo
    Cropped shot of woman holding inhaler device.
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration. — Stock Photo
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration.
    Sad shirtless little boy sitting on hospital bed and holding orange balloon while representing concept of respiratory disease and treatment — Stock Photo
    Sad shirtless little boy sitting on hospital bed and holding orange balloon while representing concept of respiratory disease and treatment
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration. — Stock Photo
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration.
    Inhaling medicine. Senior woman using an inhaler with extension tube. — Stock Photo
    Inhaling medicine. Senior woman using an inhaler with extension tube.
    Trichophyton fungi on black background, digital illustration. — Stock Photo
    Trichophyton fungi on black background, digital illustration.
    Spirometry. Using digital spirometer with smart phone app, testing lungs. — Stock Photo
    Spirometry. Using digital spirometer with smart phone app, testing lungs.
    Spring flowers representing unhealthy human lungs, conceptual studio shot. — Stock Photo
    Spring flowers representing unhealthy human lungs, conceptual studio shot.
    Portable digital spirometer, blowing test for lungs, forced expiratory volume and peak expiratory flow rate. — Stock Photo
    Portable digital spirometer, blowing test for lungs, forced expiratory volume and peak expiratory flow rate.
    Portrait of a young girl wearing a pollution mask. — Stock Photo
    Portrait of a young girl wearing a pollution mask.
    Diseased lungs in transparent female body on black background, computer illustration. — Stock Photo
    Diseased lungs in transparent female body on black background, computer illustration.
    Man using inhaler for asthma — Stock Photo
    Man using inhaler for asthma
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration. — Stock Photo
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration.
    Sick boy getting inhalation treatment in clinic — Stock Photo
    Sick boy getting inhalation treatment in clinic
    Digital illustration of saprophyte green mould conidiophore producing conidia. — Stock Photo
    Digital illustration of saprophyte green mould conidiophore producing conidia.
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration. — Stock Photo
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration.
    Orange colored lungs in female body silhouette, computer illustration. — Stock Photo
    Orange colored lungs in female body silhouette, computer illustration.
    Young boy with asthma problems making inhalation with mask on his face.( — Stock Photo
    Young boy with asthma problems making inhalation with mask on his face.(
    Blond boy, about 8 years old, wearing a respirator to co-infect himself with a virus — Stock Photo
    Blond boy, about 8 years old, wearing a respirator to co-infect himself with a virus
    Senior woman using spirometer, measuring lung capacity and peak expiratory force. — Stock Photo
    Senior woman using spirometer, measuring lung capacity and peak expiratory force.
    Stachybotrys fungus on black background, digital illustration. — Stock Photo
    Stachybotrys fungus on black background, digital illustration.
    Cropped shot of woman using inhaler device. — Stock Photo
    Cropped shot of woman using inhaler device.
    Female nurse showing girl patient inhaler in examination room — Stock Photo
    Female nurse showing girl patient inhaler in examination room
    Blond boy, wearing a respirator and showing one finger — Stock Photo
    Blond boy, wearing a respirator and showing one finger