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    Silver birch pollen — Stock Photo
    Silver birch pollen
    3d illustration of damaged spermatozoon in human sperm. — Stock Photo
    3d illustration of damaged spermatozoon in human sperm.
    Hypodermic needle and blood, computer illustration — Stock Photo
    Hypodermic needle and blood, computer illustration
    Cancer cell, computer illustration — Stock Photo
    Cancer cell, computer illustration
    Group of flagella cholera bacteria, digital illustration. — Stock Photo
    Group of flagella cholera bacteria, digital illustration.
    Structure of white blood cell — Stock Photo
    Structure of white blood cell
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Fat cell anatomy, computer illustration. — Stock Photo
    Fat cell anatomy, computer illustration.
    Conceptual illustration showing bacteria Vibrio cholerae in drop of water from tap. — Stock Photo
    Conceptual illustration showing bacteria Vibrio cholerae in drop of water from tap.
    Human heart anatomy — Stock Photo
    Human heart anatomy
    Coronary angioplasty stent insertion — Stock Photo
    Coronary angioplasty stent insertion
    DNA strand against blue background, digital illustration. — Stock Photo
    DNA strand against blue background, digital illustration.
    Illustration showing structure of influenza flu virus. — Stock Photo
    Illustration showing structure of influenza flu virus.
    Anthrax bacteria, illustration. Anthrax bacteria (Bacillus anthracis) are the cause of the disease anthrax in humans and livestock. They are gram-positive spore producing bacteria arranged in chains (streptobacilli). Many cells have a central spore. — Stock Photo
    Anthrax bacteria, illustration. Anthrax bacteria (Bacillus anthracis) are the cause of the disease anthrax in humans and livestock. They are gram-positive spore producing bacteria arranged in chains (streptobacilli). Many cells have a central spore.
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells — Stock Photo
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells
    T-cell attached to cancer cell — Stock Photo
    T-cell attached to cancer cell
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Illustration of condiophores of fungus Aspergillus fumigatus — Stock Photo
    Illustration of condiophores of fungus Aspergillus fumigatus
    3d illustration of transparent cells with nuclei on purple background. — Stock Photo
    3d illustration of transparent cells with nuclei on purple background.
    Coronary angioplasty stent insertion — Stock Photo
    Coronary angioplasty stent insertion
    Blue Adenovirus particles, colored digital 3d illustration. — Stock Photo
    Blue Adenovirus particles, colored digital 3d illustration.
    Histoplasma capsulatum fungus, illustration. Histoplasma capsulatum is a species of parasitic, yeast-like dimorphic fungus that can, if inhaled, cause a type of lung infection called histoplasmosis — Stock Photo
    Histoplasma capsulatum fungus, illustration. Histoplasma capsulatum is a species of parasitic, yeast-like dimorphic fungus that can, if inhaled, cause a type of lung infection called histoplasmosis
    Tuberculosis bacteria. Computer illustration of Mycobacterium tuberculosis bacteria, the Gram-positive rod-shaped bacteria which cause the disease tuberculosis — Stock Photo
    Tuberculosis bacteria. Computer illustration of Mycobacterium tuberculosis bacteria, the Gram-positive rod-shaped bacteria which cause the disease tuberculosis
    Anthrax bacteria, computer illustration. Anthrax bacteria (Bacillus anthracis) are cause of disease anthrax in humans and livestock — Stock Photo
    Anthrax bacteria, computer illustration. Anthrax bacteria (Bacillus anthracis) are cause of disease anthrax in humans and livestock
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract. — Stock Photo
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract.
    Gram-negative plague bacteria Yersinia pestis with bipolar staining, digital illustration. — Stock Photo
    Gram-negative plague bacteria Yersinia pestis with bipolar staining, digital illustration.
    A vast dust storm appears over the rim of a crater on Mars. Mars is the fourth planet in our Solar System, and the subject of more space missions than any other world — Stock Photo
    A vast dust storm appears over the rim of a crater on Mars. Mars is the fourth planet in our Solar System, and the subject of more space missions than any other world
    COVID-19 vaccine syringe rocket launching — Stock Photo
    COVID-19 vaccine syringe rocket launching
    Sperm spermatozoa swimming towards egg cell, colored digital illustration. — Stock Photo
    Sperm spermatozoa swimming towards egg cell, colored digital illustration.
    Toilet seat microbes, conceptual digital illustration. — Stock Photo
    Toilet seat microbes, conceptual digital illustration.
    Toilet seat microbes, conceptual digital illustration. — Stock Photo
    Toilet seat microbes, conceptual digital illustration.
    Yellow rod-shaped bacteria on white background, digital illustration. — Stock Photo
    Yellow rod-shaped bacteria on white background, digital illustration.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Neisseria gonorrhoeae bacteria, digital illustration. — Stock Photo
    Neisseria gonorrhoeae bacteria, digital illustration.
    Norovirus, illustration. Norovirus or 'winter vomiting bug' is a genus of RNA virus that causes many cases of stomach upset. The disease is characterised by nausea, vomiting, diarrhoea and abdominal pain — Stock Photo
    Norovirus, illustration. Norovirus or 'winter vomiting bug' is a genus of RNA virus that causes many cases of stomach upset. The disease is characterised by nausea, vomiting, diarrhoea and abdominal pain
    Plague bacteria (Yersinia pestis), computer illustration. Y. pestis are gram-negative bacteria from the Enterobacteriaceae family, they have an ovoid shape with bipolar staining (more intensively stained at poles) — Stock Photo
    Plague bacteria (Yersinia pestis), computer illustration. Y. pestis are gram-negative bacteria from the Enterobacteriaceae family, they have an ovoid shape with bipolar staining (more intensively stained at poles)
    Coronavirus infection, conceptual illustration. — Stock Photo
    Coronavirus infection, conceptual illustration.
    Normal flora of human intestine, conceptual computer illustration — Stock Photo
    Normal flora of human intestine, conceptual computer illustration
    Reovirus viral particle — Stock Photo
    Reovirus viral particle
    3d illustration of Pasteurella multocida bacteria. This is Gram-negative, non-motile, penicillin-sensitive coccobacillus belonging to the Pasteurellaceae family — Stock Photo
    3d illustration of Pasteurella multocida bacteria. This is Gram-negative, non-motile, penicillin-sensitive coccobacillus belonging to the Pasteurellaceae family
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Bloodstream showing red blood cells — Stock Photo
    Bloodstream showing red blood cells
    Running female silhouette with glowing nervous system, digital illustration. — Stock Photo
    Running female silhouette with glowing nervous system, digital illustration.
    3d digital illustration of narrowed blood vessel. — Stock Photo
    3d digital illustration of narrowed blood vessel.
    Conceptual illustration of human microbiome microbes on white background. — Stock Photo
    Conceptual illustration of human microbiome microbes on white background.
    Cell infected with virus particles causing a programmed cell death, 3d illustration — Stock Photo
    Cell infected with virus particles causing a programmed cell death, 3d illustration
    UFO saucer flying in cloudy sky, illustration. — Stock Photo
    UFO saucer flying in cloudy sky, illustration.
    Balamuthia mandrillaris amoeba, computer illustration. — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Human brain and spinal cord, computer illustration — Stock Photo
    Human brain and spinal cord, computer illustration
    Vehicle on surface of moon, scientific digital illustration. — Stock Photo
    Vehicle on surface of moon, scientific digital illustration.
    Human papilloma virus (HPV), computer illustration — Stock Photo
    Human papilloma virus (HPV), computer illustration
    Balamuthia mandrillaris amoeba, computer illustration — Stock Photo
    Balamuthia mandrillaris amoeba, computer illustration
    Liver with cirrhosis, computer illustration. Cirrhosis is a consequence of chronic liver disease characterized by fibrosis and scarring of tissue — Stock Photo
    Liver with cirrhosis, computer illustration. Cirrhosis is a consequence of chronic liver disease characterized by fibrosis and scarring of tissue
    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    Anthrax bacteria, computer illustration. Anthrax bacteria (Bacillus anthracis) are cause of disease anthrax in humans and livestock — Stock Photo
    Anthrax bacteria, computer illustration. Anthrax bacteria (Bacillus anthracis) are cause of disease anthrax in humans and livestock
    Smear from oral cavity showing oral trichomonas and buccal epithelial cells, digital illustration. — Stock Photo
    Smear from oral cavity showing oral trichomonas and buccal epithelial cells, digital illustration.
    Cell membrane structure, digital illustration. — Stock Photo
    Cell membrane structure, digital illustration.
    West Nile virus particles, computer illustration. West Nile virus (WNV) is known to cause encephalitis in humans. — Stock Photo
    West Nile virus particles, computer illustration. West Nile virus (WNV) is known to cause encephalitis in humans.
    Conceptual illustration of human microbiome microbes, full frame. — Stock Photo
    Conceptual illustration of human microbiome microbes, full frame.