Medicine

http://www.flickr.com/photos/enggul/4834383075/

http://www.flickr.com/photos/ajc1/510676658

Bacteria

Chicken Pox

http://w

ww.flickr.com

/photos/lupinoduck/5966487863/

Vaccine

http://www.flickr.com/photos/andresrueda/2983149263/

http://www.flickr.com/photos/ashclements/46637163/

Sick

http://www.flickr.com/photos/nottinghamvets/5828221893/sizes/z/in/photostream/

Macrophage

http://www.flickr.com/photos/bambolia/1860998785/sizes/l/in/photostream/

Fungi

http://www.flickr.com/photos/ringai/3974639591/sizes/m/in/photostream/

Antigen

http://www.flickr.com/photos/cimmyt/5071586801/sizes/l/in/photostream/

Pathogen

Small Pox

http://www.flickr.com/photos/blkjesus01/516325010/sizes/l/in/photostream/