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    Conceptual illustration of coronavirus particles entering human lungs. — Stock Photo
    Conceptual illustration of coronavirus particles entering human lungs.
    Digital illustration of rod-shaped bacteria inside alveoli of lungs causing pneumonia. — Stock Photo
    Digital illustration of rod-shaped bacteria inside alveoli of lungs causing pneumonia.
    Viruses infecting human cells — Stock Photo
    Viruses infecting human cells
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration. — Stock Photo
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration.
    Digital illustration of Klebsiella granulomatis bacteria causing genital ulcer in case of donovanosis infection. — Stock Photo
    Digital illustration of Klebsiella granulomatis bacteria causing genital ulcer in case of donovanosis infection.
    Conceptual illustration of coronavirus particles in human lungs. — Stock Photo
    Conceptual illustration of coronavirus particles in human lungs.
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual computer illustration. — Stock Photo
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual computer illustration.
    Illustration of SARS-Cov-2 viruses (red), the cause of Covid-19, infecting the brain — Stock Photo
    Illustration of SARS-Cov-2 viruses (red), the cause of Covid-19, infecting the brain
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream. — Stock Photo
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream.
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream. — Stock Photo
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream.
    Conceptual illustration showing virus infecting neurons of brain. — Stock Photo
    Conceptual illustration showing virus infecting neurons of brain.
    Rod-shaped bacteria infecting organism — Stock Photo
    Rod-shaped bacteria infecting organism
    Hepatitis B virus particles in 360-degree panorama view, colored digital illustration. — Stock Photo
    Hepatitis B virus particles in 360-degree panorama view, colored digital illustration.