http://www.flickr.com/photos/microbeworld/5981923914Bacteria

http://www.flickr.com/photos/squirmelia/12346380

Fungi

http://www.flickr.com/photos/alvi2047/3483848619

Vaccine

http://www.flickr.com/photos/sheepies/3539476944 Chicken Pox

http://www.flickr.com/photos/microbeworld/6055678631

T-Cells

Flu

http://www.flickr.com/photos/eantoniovg/3484148699/sizes/z/in/photostream/

Polio http://www.flickr.com/photos/medapt/455019678/sizes/z/in/photostream/

Malaria

http://www.flickr.com/photos/ashclements/28164958/sizes/z/in/photostream/

Antigen

http://www.flickr.com/photos/ringai/3975402556/sizes/m/in/photostream/

Parasite

http://www.flickr.com/photos/jimfischer/182605629/sizes/z/in/photostream/