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    Woman blowing nose on tissue outdoors. — Stock Photo
    Woman blowing nose on tissue outdoors.
    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
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Asian grandmother checking for signs of rash on granddaughter arm. — Stock Photo
    Asian grandmother checking for signs of rash on granddaughter arm.
    Front view of a mixed race woman with long dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, walking with her bicycle and using a smartphone — Stock Photo
    Front view of a mixed race woman with long dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, walking with her bicycle and using a smartphone
    Stachybotrys toxic mould fruiting structure with spores, digital illustration. — Stock Photo
    Stachybotrys toxic mould fruiting structure with spores, digital illustration.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Cropped shot of woman using inhaler device. — Stock Photo
    Cropped shot of woman using inhaler device.
    Side view of a mixed race woman with long dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, standing in a city street with buildings in the background. — Stock Photo
    Side view of a mixed race woman with long dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, standing in a city street with buildings in the background.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Microscopic Dust mites on floor — Stock Photo
    Microscopic Dust mites on floor
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Business man with protective face mask using phone on city street — Stock Photo
    Business man with protective face mask using phone on city street
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration. — Stock Photo
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Pink colored dust mite, digital illustration. — Stock Photo
    Pink colored dust mite, digital illustration.
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    Female doctor measuring with calipers allergic reaction during skin prick test. — Stock Photo
    Female doctor measuring with calipers allergic reaction during skin prick test.
    Trichophyton fungi on white background, digital illustration. — Stock Photo
    Trichophyton fungi on white background, digital illustration.
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, hailing a taxi. — Stock Photo
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, hailing a taxi.
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, covering his face while coughing. — Stock Photo
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, covering his face while coughing.
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19 and using a smartphone. — Stock Photo
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19 and using a smartphone.
    Woman across the street with a mask and sunglasses — Stock Photo
    Woman across the street with a mask and sunglasses
    Parasitic dust mite on white background, digital illustration. — Stock Photo
    Parasitic dust mite on white background, digital illustration.
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, riding his bicycle. — Stock Photo
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, riding his bicycle.
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, covering his face while coughing. — Stock Photo
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, covering his face while coughing.
    Mast cell releasing histamine during allergic response, digital illustration. — Stock Photo
    Mast cell releasing histamine during allergic response, digital illustration.
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, wheeling a bicycle. — Stock Photo
    Senior Caucasian man out and about in the city streets during the day, wearing a face mask against coronavirus, covid 19, wheeling a bicycle.
    Woman using inhaler — Stock Photo
    Woman using inhaler
    Sick mature woman sneezing into tissue. — Stock Photo
    Sick mature woman sneezing into tissue.
    Mast cell releasing histamine during allergic response, digital illustration. — Stock Photo
    Mast cell releasing histamine during allergic response, digital illustration.
    Close-up of syringes for allergy patch test. — Stock Photo
    Close-up of syringes for allergy patch test.
    Mature man sneezing into handkerchief. — Stock Photo
    Mature man sneezing into handkerchief.
    Side view close up of a mixed race woman with dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, standing with hands to her mouth with her bicycle in the background. — Stock Photo
    Side view close up of a mixed race woman with dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, standing with hands to her mouth with her bicycle in the background.
    Hands of doctor performing allergy skin prick test on little boy arm. — Stock Photo
    Hands of doctor performing allergy skin prick test on little boy arm.
    Light micrograph of Aspergillus sp. Fungus. — Stock Photo
    Light micrograph of Aspergillus sp. Fungus.
    Close-up of woman scratching itchy arm. — Stock Photo
    Close-up of woman scratching itchy arm.
    Spring flowers representing unhealthy human lungs, conceptual studio shot. — Stock Photo
    Spring flowers representing unhealthy human lungs, conceptual studio shot.
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Toxic mould spores of Stachybotrys chartarum fungus, digital illustration. — Stock Photo
    Toxic mould spores of Stachybotrys chartarum fungus, digital illustration.
    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
    Colored digital illustration of parasitic dust mites. — Stock Photo
    Colored digital illustration of parasitic dust mites.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Close-up of immunologist performing skin prick allergy testing on boy. — Stock Photo
    Close-up of immunologist performing skin prick allergy testing on boy.
    Microscopic Dust mites on floor — Stock Photo
    Microscopic Dust mites on floor
    Eosinophilia blood smear with numerous eosinophils, digital illustration. — Stock Photo
    Eosinophilia blood smear with numerous eosinophils, digital illustration.
    Illustration of eosinophil white blood cell with purple lobed nuclei. — Stock Photo
    Illustration of eosinophil white blood cell with purple lobed nuclei.
    3d illustration of variety of different pollen grains. — Stock Photo
    3d illustration of variety of different pollen grains.
    Female doctor smiling and giving eye drops to a little girl in her bed. Home doctor concept — Stock Photo
    Female doctor smiling and giving eye drops to a little girl in her bed. Home doctor concept
    Dust mite parasite, microscopic digital illustration. — Stock Photo
    Dust mite parasite, microscopic digital illustration.
    Spring flowers representing healthy and unhealthy human lungs, conceptual studio shot. — Stock Photo
    Spring flowers representing healthy and unhealthy human lungs, conceptual studio shot.
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration. — Stock Photo
    Filamentous dematiaceous allergenic fungus Alternaria alternata, digital illustration.
    Woman using inhaler — Stock Photo
    Woman using inhaler
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Female pediatrician performing allergy skin prick test on little boy with mother in immunologist office. — Stock Photo
    Female pediatrician performing allergy skin prick test on little boy with mother in immunologist office.
    Front view of a mixed race woman with long dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, standing in a city street with buildings in the background. — Stock Photo
    Front view of a mixed race woman with long dark hair out and about in the city streets during the day, wearing a face mask against air pollution and coronavirus, standing in a city street with buildings in the background.
    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
    3d illustration of leukocyte cells secreting allergen antibodies while allergy. — Stock Photo
    3d illustration of leukocyte cells secreting allergen antibodies while allergy.
    Side view of a mixed race woman with long dark hair sitting at a table in a cafe during the day, wearing sunglasses and a face mask against air pollution and coronavirus, working on a laptop computer with buildings in the background. — Stock Photo
    Side view of a mixed race woman with long dark hair sitting at a table in a cafe during the day, wearing sunglasses and a face mask against air pollution and coronavirus, working on a laptop computer with buildings in the background.
    Female doctor attends to her patient in the clinic. They have the mask on. — Stock Photo
    Female doctor attends to her patient in the clinic. They have the mask on.