A 3D graphic representation of a spherical-shaped, measles virus particle, that was studded with glycoprotein tubercles.… Free Image from public domain license 
A medical illustration of drug–resistant, Neisseria gonorrhoeae bacteria. Original image sourced from US Government… Free Image from public domain license 
A 3D graphical representation of a number of Rotavirus virions, set against a black background. Original image sourced from… Free Image from public domain license 
An electron microscopic (SEM) image, depicts a blue-colored, human white blood cell, (WBC) known specifically as a… Free Image from public domain license 
A photomicrograph of Candida albicans fungal spores. Original image sourced from US Government department: Public Health… Free Image from public domain license 
A medical illustration of drug–resistant, Streptococcus pneumoniae bacteria. Original image sourced from US Government… Free Image from public domain license 
Transmission electron microscopic (TEM) image highlights the particle envelope of a single, spherical shaped, Middle East… Free Image from public domain license 
3D print of a SARS-CoV-2—also known as 2019-nCoV. Original image sourced from US Government department: The National… Free Image from public domain license 
A 3D illustration provides a graphical representation of a single norovirus virion, set against a beige background. Original… Free Image from public domain license 
A Petri dish culture plate, which had contained a growth medium of sheep blood agar (SBA), and which was inoculated with… Free Image from public domain license 
Influenza virus illustration in semi- transparent blue. Original image sourced from US Government department: Public Health… Free Image from public domain license 
A 440X photomicrograph magnification of a hematoxylin and eosin (H&E)–stained liver tissue specimen, revealed the… Free Image from public domain license 
A medical illustration of drug–resistant, Mycoplasma genitalium bacteria. Original image sourced from US Government… Free Image from public domain license 
A medical illustration of clindamycin–resistant group B Streptococcus bacteria. Original image sourced from US… Free Image from public domain license 
A 3D image of a number of oblong–shaped, Vibrio parahaemolyticus bacteria Original image sourced from US Government… Free Image from public domain license 
A 3D computer–generated image of a cluster of barrel-shaped, Clostridium perfringens bacteria. Original image sourced… Free Image from public domain license 
A 1000X photomicrograph magnification of numerous, rod-shaped, Gram–negative, Yersinia pestis bacilli. Original image… Free Image from public domain license 
3D print of a SARS-CoV-2—also known as 2019-nCoV. Original image sourced from US Government department: The National… Free Image from public domain license 
A medical illustration of drug–resistant, Neisseria gonorrhoeae bacteria. Original image sourced from US Government… Free Image from public domain license 
Influenza virus illustration in semi- transparent blue. Original image sourced from US Government department: Public Health… Free Image from public domain license 
3D print of a spike protein on the surface of SARS-CoV-2—also known as 2019-nCoV, the virus that causes COVID-19.… Free Image from public domain license 
A petri dish culture plate contained a growth medium of sheep blood agar (SBA), which was inoculated with Bacillus anthracis… Free Image from public domain license 
Influenza virus illustration in semi- transparent blue. Original image sourced from US Government department: Public Health… Free Image from public domain license 
Influenza virus illustration in semi–transparent blue. Original image sourced from US Government department: Public… Free Image from public domain license 
A medical illustration of drug–resistant, nontyphoidal, Salmonella sp. bacteria. Original image sourced from US… Free Image from public domain license 
A medical illustration of drug–resistant, nontyphoidal, Salmonella sp. bacteria. Original image sourced from US… Free Image from public domain license 
A 3D image of a group of Gram-positive, Streptococcus pneumoniae bacteria. Original image sourced from US Government… Free Image from public domain license 
A medical illustration of drug–resistant, Mycoplasma genitalium bacteria. Original image sourced from US Government… Free Image from public domain license 
A 3D image of a group of Gram–positive, Corynebacterium diphtheriae, bacteria. Original image sourced from US… Free Image from public domain license 
A medical illustration of Clostridioides difficile bacteria, formerly known as Clostridium difficile. Original image sourced… Free Image from public domain license 
A 3D graphical representation of a number of norovirus virions, set against a black background. Original image sourced from… Free Image from public domain license 
A 3D image of a group of diplococcal, Gram-negative, Neisseria meningitidis, bacteria. Original image sourced from US… Free Image from public domain license 
A medical illustration of drug–resistant, Neisseria gonorrhoeae bacteria. Original image sourced from US Government… Free Image from public domain license 
A photomicrograph reveals the presence of numerous, rod-shaped, Gram–negative, Yersinia pestis bacilli. Original image… Free Image from public domain license 
A 3D illustration provides a graphical representation of a single norovirus virion, set against a white background. Original… Free Image from public domain license 
Influenza virus illustration in semi–transparent blue. A healthcare provider donning a pair of green latex gloves in… Free Image from public domain license 
A 200X photomicrograph magnification of a direct fluorescent antibody (DFA) stained sample revealed the presence of rod… Free Image from public domain license 
A 100X photomicrograph magnification of a hematoxylin and eosin (H&E)–stained liver tissue specimen, revealed the… Free Image from public domain license 
A medical illustration of drug–resistant, nontyphoidal, Salmonella sp. bacteria. Original image sourced from US… Free Image from public domain license 
A 3D image of a group of Gram–negative, Chlamydia psittaci bacteria. Original image sourced from US Government… Free Image from public domain license 
A 100X photomicrograph magnification of photomicrograph of a hematoxylin and eosin (H&E) stained liver tissue specimen… Free Image from public domain license 
A medical illustration of vancomycin–resistant, Enterococci sp. bacteria. Original image sourced from US Government… Free Image from public domain license 
3D print of a spike protein on the surface of SARS-CoV-2—also known as 2019-nCoV, the virus that causes COVID-19.… Free Image from public domain license 
3D Print of MERS-CoV Spike. Original image sourced from US Government department: The National Institute of Allergy and… Free Image from public domain license 
3D Print of MERS-CoV Spike. Original image sourced from US Government department: The National Institute of Allergy and… Free Image from public domain license 
This anaglyph view of 'Souffle,' to the left of 'Yogi,' was produced by NASA's Mars Pathfinder's Imager camera. July… Free Image from public domain license 
