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    Leukaemia cells in a patient with Bloom's syndrome, coloured transmission electron micrograph (TEM). — Stock Photo
    Leukaemia cells in a patient with Bloom's syndrome, coloured transmission electron micrograph (TEM).
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream. — Stock Photo
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream.
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Young girl standing holding a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada — Stock Photo
    Young girl standing holding a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus — Stock Photo
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Man wearing a mask and gloves holding his hands on his head as he walking on a path by the Legislature during the Covid-19 world pandemic; Edmonton, Alberta, Canada — Stock Photo
    Man wearing a mask and gloves holding his hands on his head as he walking on a path by the Legislature during the Covid-19 world pandemic; Edmonton, Alberta, Canada
    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.
    Viral lung infection, illustration. Inflamed lungs infected with virus particles. — Stock Photo
    Viral lung infection, illustration. Inflamed lungs infected with virus particles.
    Coronavirus (Covid-19) with a mask on a white background — Stock Photo
    Coronavirus (Covid-19) with a mask on a white background
    Helicobacter pylori bacterium — Stock Photo
    Helicobacter pylori bacterium
    Young girl standing holding protective mask in her hands during the Coronavirus World Pandemic; Toronto, Ontario, Canada — Stock Photo
    Young girl standing holding protective mask in her hands during the Coronavirus World Pandemic; Toronto, Ontario, Canada
    Vaccinia virus particle — Stock Photo
    Vaccinia virus particle
    Young girl standing wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada — Stock Photo
    Young girl standing wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada
    Zika virus particles — Stock Photo
    Zika virus particles
    Man wearing a mask and gloves walking on a path outside using his smart phone during the Covid-19 world pandemic; Edmonton, Alberta, Canada — Stock Photo
    Man wearing a mask and gloves walking on a path outside using his smart phone during the Covid-19 world pandemic; Edmonton, Alberta, Canada
    Boy using his smart phone and wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada — Stock Photo
    Boy using his smart phone and wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada
    Varicella zoster virus particle — Stock Photo
    Varicella zoster virus particle
    Viral lung infection, illustration. Inflamed lungs infected with virus particles. — Stock Photo
    Viral lung infection, illustration. Inflamed lungs infected with virus particles.
    Covid-19, Coronavirus. Several covid-19 viruses infecting the human organism. Concept image of the virus inside human cells. — Stock Photo
    Covid-19, Coronavirus. Several covid-19 viruses infecting the human organism. Concept image of the virus inside human cells.
    Young girl standing at a playground wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada — Stock Photo
    Young girl standing at a playground wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada
    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Covid-19, Coronavirus. Several covid-19 viruses infecting the human organism. Concept image of the virus inside human cells. — Stock Photo
    Covid-19, Coronavirus. Several covid-19 viruses infecting the human organism. Concept image of the virus inside human cells.
    Wellington Street in Covent Garden at evening rush hour during the national lockdown during Covid-19 world pandemic; London, England — Stock Photo
    Wellington Street in Covent Garden at evening rush hour during the national lockdown during Covid-19 world pandemic; London, England
    Zika virus particles — Stock Photo
    Zika virus particles
    Sign for Take-Away food on a red door during national lockdown, Covid-19 Global Pandemic; London, England — Stock Photo
    Sign for Take-Away food on a red door during national lockdown, Covid-19 Global Pandemic; London, England
    Vaccinia virus particle — Stock Photo
    Vaccinia virus particle
    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.
    Young girl standing wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada — Stock Photo
    Young girl standing wearing a protective mask to protect against COVID-19 during the Coronavirus World Pandemic; Toronto, Ontario, Canada
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).