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    Micrograph of H3N2 influenza virus particles. — Stock Photo
    Micrograph of H3N2 influenza virus particles.
    Human lungs with bacterial pneumonia and close-up of bacteria. — Stock Photo
    Human lungs with bacterial pneumonia and close-up of bacteria.
    Caregiver making injection for senior patient at home — Stock Photo
    Caregiver making injection for senior patient at home
    3d illustration of blood cells and Plasmodium parasites causing malaria. — Stock Photo
    3d illustration of blood cells and Plasmodium parasites causing malaria.
    Cropped unrecognizable female medical specialist in protective uniform, latex gloves and face mask vaccinating African American man patient in clinic during coronavirus outbreak — Stock Photo
    Cropped unrecognizable female medical specialist in protective uniform, latex gloves and face mask vaccinating African American man patient in clinic during coronavirus outbreak
    Digital illustration of cross-section of blood vessel with acute lymphoblastic leukaemia showing abundant lymphoblasts. — Stock Photo
    Digital illustration of cross-section of blood vessel with acute lymphoblastic leukaemia showing abundant lymphoblasts.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Parasitic amoeba engulfing red blood cells — Stock Photo
    Parasitic amoeba engulfing red blood cells
    Digital artwork of silhouette with liver and close-up of hepatitis C virus particle. — Stock Photo
    Digital artwork of silhouette with liver and close-up of hepatitis C virus particle.
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia. — Stock Photo
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia.
    Coloured scanning electron micrograph of the rod-shaped, Gram-negative bacteria Escherichia coli, commonly known as E. coli — Stock Photo
    Coloured scanning electron micrograph of the rod-shaped, Gram-negative bacteria Escherichia coli, commonly known as E. coli
    Herpes simplex virus, computer illustration — Stock Photo
    Herpes simplex virus, computer illustration
    Group of viruses, computer illustration — Stock Photo
    Group of viruses, computer illustration
    Digital illustration showing close-up of cholera infection bacteria in small intestine. — Stock Photo
    Digital illustration showing close-up of cholera infection bacteria in small intestine.
    MERS virus infection of lungs, conceptual illustration. — Stock Photo
    MERS virus infection of lungs, conceptual illustration.
    Human heart with disease, computer illustration. — Stock Photo
    Human heart with disease, computer illustration.
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore — Stock Photo
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore
    Close-up of adenovirus infecting human lungs, digital illustration. — Stock Photo
    Close-up of adenovirus infecting human lungs, digital illustration.
    Oesophageal cancer, composite digital illustration with human body and cancer cell. — Stock Photo
    Oesophageal cancer, composite digital illustration with human body and cancer cell.
    Parasitic amoeba engulfing red blood cells — Stock Photo
    Parasitic amoeba engulfing red blood cells
    Computer illustration of a varicella zoster virus particles, the cause of chickenpox and shingles. Varicella zoster virus is also known as human herpes virus type 3 (HHV-3) — Stock Photo
    Computer illustration of a varicella zoster virus particles, the cause of chickenpox and shingles. Varicella zoster virus is also known as human herpes virus type 3 (HHV-3)
    Lung cancer, digital illustration and light micrograph showing lung adenocarcinoma. — Stock Photo
    Lung cancer, digital illustration and light micrograph showing lung adenocarcinoma.
    Ebola virus particles in blood, digital illustration. — Stock Photo
    Ebola virus particles in blood, digital illustration.
    Female medical specialist in protective uniform, latex gloves and face mask doing nasal coronavirus test on African American mature woman patient in clinic during virus outbreak — Stock Photo
    Female medical specialist in protective uniform, latex gloves and face mask doing nasal coronavirus test on African American mature woman patient in clinic during virus outbreak
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs — Stock Photo
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs
    Abstract female body with back pain, conceptual digital illustration. — Stock Photo
    Abstract female body with back pain, conceptual digital illustration.
    Young female doctor in uniform and medical mask standing in room with x-ray image on wall — Stock Photo
    Young female doctor in uniform and medical mask standing in room with x-ray image on wall
    Diseased stomach in male body silhouette, conceptual computer illustration. — Stock Photo
    Diseased stomach in male body silhouette, conceptual computer illustration.
    Antibodies attacking virus particle, 3d illustration — Stock Photo
    Antibodies attacking virus particle, 3d illustration
    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
    Female medical specialist in protective uniform, latex gloves and face mask vaccinating African American man patient in clinic during coronavirus outbreak — Stock Photo
    Female medical specialist in protective uniform, latex gloves and face mask vaccinating African American man patient in clinic during coronavirus outbreak
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    From above of ill boy measuring temperature with electronic thermometer while lying on couch at home and having flu — Stock Photo
    From above of ill boy measuring temperature with electronic thermometer while lying on couch at home and having flu
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration.
    Influenza myxovirus particle containing RNA, 3d digital illustration. — Stock Photo
    Influenza myxovirus particle containing RNA, 3d digital illustration.
    Acute pyelonephritis, computer illustration and light micrograph — Stock Photo
    Acute pyelonephritis, computer illustration and light micrograph
    Close-up of parasitic amoeba in human intestine, digital artwork. — Stock Photo
    Close-up of parasitic amoeba in human intestine, digital artwork.
    Acute pyelonephritis. Illustration of small abscesses (yellow) on surface of kidney in case of acute pyelonephritis — Stock Photo
    Acute pyelonephritis. Illustration of small abscesses (yellow) on surface of kidney in case of acute pyelonephritis
    Female body with small intestine cancer, conceptual computer illustration. — Stock Photo
    Female body with small intestine cancer, conceptual computer illustration.
    Pneumonia caused by Mycoplasma pneumoniae bacteria, conceptual digital illustration. — Stock Photo
    Pneumonia caused by Mycoplasma pneumoniae bacteria, conceptual digital illustration.
    From below ill boy measuring temperature with electronic thermometer while lying on couch at home and having flu — Stock Photo
    From below ill boy measuring temperature with electronic thermometer while lying on couch at home and having flu
    Nodamura virus (NoV), illustration. This virus can cause lethal infections in mammals, fish and insects. It is named after the village of Nodamura in Japan where it was first discovered — Stock Photo
    Nodamura virus (NoV), illustration. This virus can cause lethal infections in mammals, fish and insects. It is named after the village of Nodamura in Japan where it was first discovered
    Female medical specialist in protective uniform, latex gloves and face mask vaccinating African American mature woman patient in clinic during coronavirus outbreak — Stock Photo
    Female medical specialist in protective uniform, latex gloves and face mask vaccinating African American mature woman patient in clinic during coronavirus outbreak
    Illustration of yellow abscesses on kidney and close-up of Enterococcus bacteria. — Stock Photo
    Illustration of yellow abscesses on kidney and close-up of Enterococcus bacteria.
    Illustration of female reproductive system and parasitic Trichomonas vaginalis causing trichomoniasis. — Stock Photo
    Illustration of female reproductive system and parasitic Trichomonas vaginalis causing trichomoniasis.
    Endobronchial valves fitted to treat tuberculosis — Stock Photo
    Endobronchial valves fitted to treat tuberculosis
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration. — Stock Photo
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration.
    Transfusion transmitted virus particles, digital illustration — Stock Photo
    Transfusion transmitted virus particles, digital illustration
    Digital illustration showing malignant growth in pancreas while pancreatic cancer. — Stock Photo
    Digital illustration showing malignant growth in pancreas while pancreatic cancer.
    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
    Abstract model of seasonal influenza B virus, conceptual digital illustration. — Stock Photo
    Abstract model of seasonal influenza B virus, conceptual digital illustration.
    Computer illustration of a varicella zoster virus particles, the cause of chickenpox and shingles. Varicella zoster virus is also known as human herpes virus type 3 (HHV-3) — Stock Photo
    Computer illustration of a varicella zoster virus particles, the cause of chickenpox and shingles. Varicella zoster virus is also known as human herpes virus type 3 (HHV-3)
    Man holding knee in pain, close-up. — Stock Photo
    Man holding knee in pain, close-up.
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with cirrhosis, showing fibrosis and lack of a functional liver anatomy. — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with cirrhosis, showing fibrosis and lack of a functional liver anatomy.
    Illustration of coronaviruses, the cause of the new disease covid-19 — Stock Photo
    Illustration of coronaviruses, the cause of the new disease covid-19
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Female anatomical silhouette with breast disease, conceptual computer illustration. — Stock Photo
    Female anatomical silhouette with breast disease, conceptual computer illustration.
    Acute pyelonephritis, computer illustration and light micrograph — Stock Photo
    Acute pyelonephritis, computer illustration and light micrograph
    Brucella bacteria, illustration. Gram-negative pleomorphic bacteria that cause brucellosis in cattle and humans and are transmitted to humans by direct contact with ill animal or by contaminated milk. — Stock Photo
    Brucella bacteria, illustration. Gram-negative pleomorphic bacteria that cause brucellosis in cattle and humans and are transmitted to humans by direct contact with ill animal or by contaminated milk.
    Illustration of adrenal glands in male body silhouette. — Stock Photo
    Illustration of adrenal glands in male body silhouette.