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Educational illustrations from the book Infectious

Infectious: Pathogens and How We Fight Them is a new popular science book written by BSI member, Dr John Tregoning. With his experience as a reader in respiratory infections at Imperial College London, he has written a homage to the scientific innovations in history that have led to the world being able to combat infectious disease. We interviewed John about his book in the December edition of Immunology News. You can read the article here.

Featured in the book are illuminating illustrations created by BSI member, Ash Uruchurtu, which John was able fund through the BSI's Communication & Engagement grant scheme. These illustrations are under a Creative Commons license, so they're free for everyone to use and download for their science communication needs!

You can click on each images below for a large, downloadable version.

Infectious COVID Virus



Obligate parasite, Nucleic Acid in a protein coat. Has to infect cell to replicate.

Examples: HIV, SARS, Influenza

Infectious bacteria download image


Prokaryote. Very diverse family. Can live independently. Treated with antibiotics.

Examples: TB, Staph aureus, Salmonella

Infectious fungus


Eukaryote. Mostly harmless, unless immunocompromised.

Examples: Athlete‚Äôs foot, Thrush, Aspergillus

Infectious worm


Worms or protozoa. Complex, multi-stage life cycles.

Examples: Malaria, Leishmaniasis, Ascaris

Innate Immune cells

Infectious macrophage


Eats stuff        

Infectious Neutrophil


Kills Stuff

Adaptive Immune cells

Infectious T cell

T cell: 
Orchestrates immune response/ Kills infected cells 

Infectious B Cell

B cell: 
Makes Antibody