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    Digital artwork of DNA strand on plain background. — Stock Photo
    Digital artwork of DNA strand on plain background.
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink). — Stock Photo
    Light micrograph (LM) of the nasal sinuses ( lined by brown epithelium ) and the supporting cartilages (pink).
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Staphylococci bacteria colony — Stock Photo
    Staphylococci bacteria colony
    Human papillomavirus virus — Stock Photo
    Human papillomavirus virus
    Human sperm approaching egg cell — Stock Photo
    Human sperm approaching egg cell
    Coloured scanning electron micrograph (SEM) of the surface of a tomato leaf. — Stock Photo
    Coloured scanning electron micrograph (SEM) of the surface of a tomato leaf.
    Blood clot, computer illustration — Stock Photo
    Blood clot, computer illustration
    Digital illustration of budding Saccharomyces cerevisiae yeast cells. — Stock Photo
    Digital illustration of budding Saccharomyces cerevisiae yeast cells.
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation — Stock Photo
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation
    White blood cell engulfing bacteria — Stock Photo
    White blood cell engulfing bacteria
    Human microbiota, conceptual illustration. microbiota is collection of microbes found on and in human body. Some of these microbes help to keep the body healthy. If balance gets disrupted, disease, disorders or infections can occur — Stock Photo
    Human microbiota, conceptual illustration. microbiota is collection of microbes found on and in human body. Some of these microbes help to keep the body healthy. If balance gets disrupted, disease, disorders or infections can occur
    Digital illustration of rod-shaped bacteria colony. — Stock Photo
    Digital illustration of rod-shaped bacteria colony.
    3d rendered illustration of skeleton in silhouette of male cyclist on black background. — Stock Photo
    3d rendered illustration of skeleton in silhouette of male cyclist on black background.
    Human fetus developing at week 25, computer illustration. — Stock Photo
    Human fetus developing at week 25, computer illustration.
    Dust mite on skin surface — Stock Photo
    Dust mite on skin surface
    Digital illustration of clostridium difficile bacteria. — Stock Photo
    Digital illustration of clostridium difficile bacteria.
    Illustration of rod-shaped and spherical (cocci) bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Legionella, Mycobacterium, Klebsiella and other species. Spherical bacteria include Staphylococci and Streptococci species — Stock Photo
    Illustration of rod-shaped and spherical (cocci) bacteria. Rod-shaped bacteria include Escherichia coli, Salmonella, Shigella, Legionella, Mycobacterium, Klebsiella and other species. Spherical bacteria include Staphylococci and Streptococci species
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Chromosomes during cell division — Stock Photo
    Chromosomes during cell division
    Illustration of human foetus on week 7 on black background. — Stock Photo
    Illustration of human foetus on week 7 on black background.
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple. — Stock Photo
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple.
    3d illustration of cholera pathogens in dark polluted water. — Stock Photo
    3d illustration of cholera pathogens in dark polluted water.
    Illustration of female silhouette with highlighted lung infection. — Stock Photo
    Illustration of female silhouette with highlighted lung infection.
    Toilet microbes on contaminated seat surface, conceptual digital illustration. — Stock Photo
    Toilet microbes on contaminated seat surface, conceptual digital illustration.
    Female scientist using microscope in laboratory. — Stock Photo
    Female scientist using microscope in laboratory.
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Digital illustration of silhouette with liver inflammation and close-up of hepatitis B virus. — Stock Photo
    Digital illustration of silhouette with liver inflammation and close-up of hepatitis B virus.
    Human fetus at week 33, computer illustration. — Stock Photo
    Human fetus at week 33, computer illustration.
    Antibodies attacking virus particles, computer illustration. — Stock Photo
    Antibodies attacking virus particles, computer illustration.
    Scientist pipetting samples into multi well plate for automated testing in laboratory. — Stock Photo
    Scientist pipetting samples into multi well plate for automated testing in laboratory.
    Transplacental transmission of Toxoplasma gondii parasites to human embryo, conceptual illustration. — Stock Photo
    Transplacental transmission of Toxoplasma gondii parasites to human embryo, conceptual illustration.
    Plant biotechnology and research — Stock Photo
    Plant biotechnology and research
    Illustration of silhouette of pregnant woman and 21 week foetus. — Stock Photo
    Illustration of silhouette of pregnant woman and 21 week foetus.
    Human heart model on white background, computer illustration. — Stock Photo
    Human heart model on white background, computer illustration.
    Colored scanning electron micrograph of pollen grains from marigold flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from marigold flower.
    Scientists using pipette with digital display. — Stock Photo
    Scientists using pipette with digital display.
    Digital illustration of intestine and close-up of hepatitis A virus particles. — Stock Photo
    Digital illustration of intestine and close-up of hepatitis A virus particles.
    Abstract animal cell on blue background, digital illustration. — Stock Photo
    Abstract animal cell on blue background, digital illustration.
    Close-up of pipetting sample into plastic micro-centrifuge tube. — Stock Photo
    Close-up of pipetting sample into plastic micro-centrifuge tube.
    Pipette adding sample to petri dish with DNA autoradiogram in background. — Stock Photo
    Pipette adding sample to petri dish with DNA autoradiogram in background.
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation — Stock Photo
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation
    Illustration of kidneys and close-up of infection bacteria in male body silhouette on black background. — Stock Photo
    Illustration of kidneys and close-up of infection bacteria in male body silhouette on black background.
    Ebola virus particles in blood, digital illustration. — Stock Photo
    Ebola virus particles in blood, digital illustration.
    Zika virus blue particles, digital illustration. — Stock Photo
    Zika virus blue particles, digital illustration.
    Deoxyribonucleic acid damage, digital illustration with concept of disease, genetic disorder and genetic engineering. — Stock Photo
    Deoxyribonucleic acid damage, digital illustration with concept of disease, genetic disorder and genetic engineering.
    Illustration of HIV particles in blood. — Stock Photo
    Illustration of HIV particles in blood.
    Ovarian cells section — Stock Photo
    Ovarian cells section
    Eggs of parasitic worm Trichuris trichiura, computer illustration — Stock Photo
    Eggs of parasitic worm Trichuris trichiura, computer illustration
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Mucor mould, also known as black fungus, computer illustration. Mucor sp. fungi are found in soil and decaying organic matter and are common indoor moulds — Stock Photo
    Mucor mould, also known as black fungus, computer illustration. Mucor sp. fungi are found in soil and decaying organic matter and are common indoor moulds
    Escherichia coli bacteria on gecko tongue — Stock Photo
    Escherichia coli bacteria on gecko tongue
    Colored norovirus particles, digital illustration. — Stock Photo
    Colored norovirus particles, digital illustration.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Abdominal lymph nodes in female body, computer illustration. — Stock Photo
    Abdominal lymph nodes in female body, computer illustration.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Scanning electron micrograph of PC12 neurone in culture. — Stock Photo
    Scanning electron micrograph of PC12 neurone in culture.
    Lysosome fusing with autophagosome — Stock Photo
    Lysosome fusing with autophagosome
    AIDS virus and antibodies — Stock Photo
    AIDS virus and antibodies