http://www.flickr.com/photos/chinchillo/3471259253/sizes/m/in/photostream/

Fungi

http://www.flickr.com/photos/andresrueda/2983149263/sizes/m/in/photostream/

Vaccine

http://www.flickr.com/photos/ajc1/510676658/sizes/m/in/photostream/Bacteria

http://www.flickr.com/photos/mkuram/3700928671/sizes/m/in/photostream/ Malaria

Protozoa

http://www.flickr.com/photos/microagua/3333879288/sizes/m/in/photostream/

http://www.flickr.com/photos/rbrwr/117311111/sizes/m/in/photostream/Antibiotics

http://www.flickr.com/photos/jbarton/1160299917/sizes/m/in/photostream/

Tuberculosis

http://www.flickr.com/photos/gehealthcare/4253574505/sizes/m/in/photostream/

Antibodies

http://www.flickr.com/photos/sanofi-pasteur/5284032560/sizes/z/in/photostream/

Virus

http://www.flickr.com/photos/simplyscience/2713330949/sizes/m/in/photostream/ Antigen